World's LARGEST JELLO POOL- Can you swim in Jello?

  • Published: 16 May 2019
  • I've wanted to make this video waaay before I ever knew how to make videos. Go to and use code MARKROBER to get 75% off a 3 year plan and an extra month for free.

    Thanks to Devin Super Tramp for filming all the coolest parts of this video. Go subscribe to his channel and tell him I sent you!

    High Speed camera courtesy of They rent high speed cameras at killer prices. Hit them up.

    0:03 - Arrow - Andrew Applepie
    0:31 - Cereal Killa - Blue Wednesday
    2:14 - Run (Part 2) - Andrew Applepie
    3:58 - Arrow - Andrew Applepie
    4:39 - Sappheiros - Falling (ft eSoreni)
    5:22 - Pokemon in NYC ft Missy - Andrew Applepie
    7:24 - New Shoes - Blue Wednesday
    8:02 - Inspiring Cinematic Trailer in
    8:21 - Arrow - Andrew Applepie
    8:36 - Pata Pata - Matt Chene-
    10:08 - Q - Blue Wednesday
    11:09 - Too Happy to be cool by Notebreak

    Summary: Since I was a little kid I always wondered what it would be like to swim in a pool of Jello. Turns out it is really difficult. We heated up the Gelatin in 55 gallon drums and then used gravity to put that jello into the pool.

    They are soft-



    I make videos like this once a month all year long while supplies last:




  • Science and Technology Science and Technology

Comments • 28 058

  • Mark Rober
    Mark Rober   1 months back

    My bucket list is now one item shorter. This was a brutal amount of work but a worthy engineering challenge. MASSIVE thanks to my buddy Devin Super Tramp for filming this so don't get used to this high quality from me. He is a living legend.

    • koolaidrybot
      koolaidrybot  7 hours back

      Do a rocket plane with help from Kevin

    • Brayden Robertson
      Brayden Robertson  8 hours back


    • Kc12t
      Kc12t  1 days back

      When the deodorant says “48 hrs”
      But you drink it in 10 mins


      we know you can’t drink deodorant ITS A JOKE so don’t make me put 1 of you on r/woooosh

    • Kc12t
      Kc12t  1 days back

      Mark Rober no chance u see this but I watch you EVERYDAY the content is already great but it’s STILL getting,(play music) it’s natural talent.

    • endereye sullivan
      endereye sullivan  2 days back

      Those kids are lucky i would never get near that it will be impossible till im a adult

  • netta suomi
    netta suomi  2 hours back

    Am i the only who just pray for that one kid white shirt?

    • Hussain Tube
      Hussain Tube  4 hours back


      • Joslyn Holden
        Joslyn Holden  5 hours back

        Yes!! The office

        • Pikes Peak Jeep Rentals Maniak

          Can you pls do an experiment with shade balls

          • Andrea P
            Andrea P  8 hours back

            55 gallon of trash!

            • iTz mE dORaAaA
              iTz mE dORaAaA  8 hours back

              Those kids are having their best childhood memories with you

              • Iver Namsos
                Iver Namsos  9 hours back

                6:02 grabbin that posssssy

                • Nikka Chua
                  Nikka Chua  10 hours back

                  Super cool! 😁👌🏻

                  • Mika Mirsham
                    Mika Mirsham  11 hours back

                    Yummy 😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋😋

                    • it's it's anime playz
                      it's it's anime playz  13 hours back

                      Good job you have alot to clean 😂

                      Edit: 9:51 you dead a !!!! *dies*

                      (Not really)

                      • YMS
                        YMS  13 hours back

                        Mark Rober,

                        A question was presented to my crew and I involving orbital motions between planetary objects and their satellites in reference to revolution times. We are coming to a split decision as to whether who is "correct" and are hoping that you may be able to apply a solid scientific standard to identify which is fact; or who is "more" correct.

                        The question presented was, "Given our earth, and referencing a satellite locked into a geostationary orbit, how long does it take for the satellite to complete one revolution around the earth?"

                        We have come to two points of conclusion:

                        1. That a satellite is in an orbit around the earth, regardless of whether it is a geostationary or not. It develops that orbit by creating a motion path that "encircles" the earth and therefore follows the rules for a geosynchronous orbit time which equates to one sidereal day(approx 23hr 56min 4sec) to complete a revolution around the earth. This argument is further supported by thinking of the satellite orbit based on the center mass point of the earth being a "single point" in space as the reference and that the satellite orbits that center mass point(point in space not in motion).
                        This argument is countered with the logic that in order for the geostationary satellite to complete a revolution, its "stationary" position would have to be forgone and either the satellite itself must accelerate or decelerate in relation to the referenced point(earth) in order to complete its revolution; or vice-versa(earth accelerates/decelerates its rotation).
                        2. Since we are using the earth as the reference point, that the "Geostationary" orbit locks the "0 degree" reference point with the satellite to the ground point and degree reference on earth and as such, a geostationary satellite cannot complete one revolution around earth.
                        This argument is countered changing the point of view of the observer. If an observer is external to both the earth and it's geostationary satellite, it appears that the satellite will rotate around the earth(not accounting the earth's rotation)

                        Please help, does a geostationary satellite complete a revolution around the earth? If so, how often?

                        In the case that you make a video and If you can prove that a geostationary satellite does not make a revolution around the Earth, please say in your video, "Curtis Longoria, you owe 1st Squad Pizza" at some point towards the end.

                        • Icy Lovette
                          Icy Lovette  15 hours back

                          Hard work makes a dream work

                          • finallyanaccount
                            finallyanaccount  16 hours back

                            One of the coolest things I've ever seen. Thank you!

                            • Galaxy Girl
                              Galaxy Girl  17 hours back

                              8:11 That was my favorite episode omg.. 😂😂😂

                              • Jeanne Lyday
                                Jeanne Lyday  17 hours back


                                • yungblud tbrum
                                  yungblud tbrum  17 hours back

                                  rip pool

                                  • yungblud tbrum
                                    yungblud tbrum  17 hours back

                                    rip pool

                                    • MF DOOM
                                      MF DOOM  18 hours back

                                      Seeing the kids and simply knowing how thrilled I would have been as a kid really makes my day

                                      • Jack Mk. Gumber snaget
                                        Jack Mk. Gumber snaget  19 hours back

                                        The kid at 6:29 looks like a who

                                        • TheAsianGamer
                                          TheAsianGamer  19 hours back

                                          Congratulations! You made it into the OWL magazine with your skipping stone robot! :)

                                          • chris_dat_youngin._ Va shii

                                            Those kids Ruined it

                                            • Vinicius Medeiros
                                              Vinicius Medeiros  20 hours back

                                              Waiting for the next video Bro !

                                              • CARSONIUSMAXUMUS 283
                                                CARSONIUSMAXUMUS 283  20 hours back

                                                When new vid it's been a month

                                                • Mariana Garcia
                                                  Mariana Garcia  20 hours back

                                                  A mam giving birth 7:04

                                                  • Nita Vincent
                                                    Nita Vincent  20 hours back

                                                    You are gross eating it out a pool

                                                    • Gavin's Clubhouse
                                                      Gavin's Clubhouse  20 hours back

                                                      I like jelo

                                                      • robert storey
                                                        robert storey  21 hours back

                                                        Wish it were beans :(

                                                        • Reesa Rodriguez
                                                          Reesa Rodriguez  21 hours back

                                                          Wow! A lot of work went into this project.. 😭😜😉 PS it was satisfying

                                                          • Comfortable Sofa
                                                            Comfortable Sofa  22 hours back

                                                            Very nice upload schedule.

                                                            • Parker Helsel
                                                              Parker Helsel  22 hours back

                                                              Who else is here waiting for this mounts upload

                                                              • Raquel Riano
                                                                Raquel Riano  23 hours back

                                                                GIANT AIR HOCKEY PLEASE

                                                                • Darcy C
                                                                  Darcy C  23 hours back

                                                                  My second question, totally unrelated, and I only ask it because you seem to have such creative ideas and the desire to figure things out (so I get it if you want to pass), and because I was having a fun conversation with my prepper mom the other day. You are going on a 600-mile trek on foot. You don't have to worry about food or water. Assuming that you are not getting help elsewhere, and knowing ahead of time that you are making the trek, you place small caches of supplies at intervals along your predetermined path. Assuming that you are going about 20 miles a day, at what interval would you place the caches? What items would you include in each cache? What material would your cache be made of so as to be impervious to extreme temperatures?

                                                                  • Darcy C
                                                                    Darcy C  23 hours back

                                                                    @Mark Rober, I've watched a few of your videos now, almost on accident, stumbling onto your videos because you answer questions I need answers to. :) Do you respond to questions from fans? Because I have two questions for you. 1. There is a lava tube cave in Washington state. It is about a mile and a half long. The terrain is rough, with few flat spots, multiple narrow spaces you have to crawl or climb through, and multiple piles of uneven boulders and rocks you have to scale to move forward. About halfway through the cave is an 8 ft lava fall that you have to get up, otherwise you have to turn back. There is 1 good foothold and few useful handholds. It's hard to use rope, as there are no obvious places to anchor it. Usually it takes at least 2 people to get up, and it really helps if one of those people is tall. The Parks people, probably for liability reasons, have not built in any helps for people to get up. If you were going on this hike, and it was just you, or you and a short person, how would you get up the fall? Carrying a ladder or other similar device would be exhausting, even if you left it behind once you got up. Using an inflatable step to get up could maybe work, but the ground is so rough and sharp, it would have to be strong enough not to pop under the weight of a person. I would love to hear any ideas you might have on this.

                                                                    • Łôßêr Kïm
                                                                      Łôßêr Kïm  1 days back

                                                                      I wish I we're there

                                                                      • Rene Calderon
                                                                        Rene Calderon  1 days back

                                                                        Ok while it was in the first part you should have walked on the water

                                                                        • twins
                                                                          twins  1 days back

                                                                          This is on my bucket list

                                                                          • Cameron Shears
                                                                            Cameron Shears  1 days back

                                                                            your shirt is op because mike tysons punch out is so dope

                                                                            • DJ p
                                                                              DJ p  1 days back

                                                                              Hello oh you mean jelly speak England good

                                                                              • LionxD.J Lilysnowolf
                                                                                LionxD.J Lilysnowolf  1 days back

                                                                                It looks fun!! If I did this, I would say it was worth it!

                                                                                • Muna Karim
                                                                                  Muna Karim  1 days back

                                                                                  So good

                                                                                  • Heather Klepp
                                                                                    Heather Klepp  1 days back

                                                                                    This reminds me of phineas and ferb

                                                                                    • WM trainiert
                                                                                      WM trainiert  1 days back

                                                                                      Sorry, aber was ist das für eine Verschwendung ?

                                                                                      • Vernon Law
                                                                                        Vernon Law  1 days back

                                                                                        Hi what is your name?

                                                                                        • Alexis Cruz
                                                                                          Alexis Cruz  1 days back

                                                                                          What do you do with it after?

                                                                                          • Lorena Aguico
                                                                                            Lorena Aguico  1 days back

                                                                                            Can you walk on it

                                                                                            • Deutsch rap Bass Boosted

                                                                                              Bruh I wanna eat it

                                                                                              • Mary Poppin’
                                                                                                Mary Poppin’  1 days back

                                                                                                *doesnt fall* I’m okay *falls*