World's Largest Elephant Toothpaste Experiment

I'm not a chemist.

Science Bob's Elephant toothpaste recipe-

Here is Science Bob’s behind the scenes commentary:


0:01 - Marimba Idea - Blue Wednesday
0:15 - Arrow (Instrumental) - Andrew Applepie
1:08 - Dansez - Fasion
1:35 - Pata Pata - Miriam Makeba (Matt Cherne Remix)
2:25 - Dive - Lvly
3:49 - 6:40 - Dansez - Fasion
6:44 - Kalimba Jam - Blue Wednesday
8:16 - Salamanca - Sarah, the Illstrumentalist
9:47 - Kalimba Jam - Blue Wednesday
10:12 - Q - Blue Wednesday
11:06 - Too Happy to be cool by Notebreak

Summary: Elephant toothpaste (aka slime foam) has sort been done so many times I wanted to do it really big. We did a ton of testing.

They are soft-



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


FACEBOOK: MarkRoberYou...

TWITTER: #!/MarkRober

INSTAGRAM: markrober


  1. Mark Rober

    Mark Rober

    Year ago

    I'm finishing out 2019 real strong with some BIG videos so be sure to subscribe, bell, donate a kidney, etc.

    • Epic Obbyist

      Epic Obbyist

      24 days ago

      I donated one hope it helps 🤞🏻

    • Existence


      2 months ago

      I was inspired to like science and math because of you. Sincerely, thank you Mark for being so cool!

    • amber Cockrum

      amber Cockrum

      2 months ago

      Who’s in 2021

    • Caleb H

      Caleb H

      3 months ago

      Why can’t I be one of your cousins 😭😭😭😭

    • Romola Campbell

      Romola Campbell

      5 months ago

      Little does he know 2020 will be the worst year ever

  2. Rahma Allk

    Rahma Allk

    2 hours ago

    Why is it called elephant tooth paste is it because it’s tooth paste for elephant 🐘

  3. Riley Wallace

    Riley Wallace

    2 hours ago

    Me when every camera is covered: R.i.P 1000 pounds

  4. Vishag .s

    Vishag .s

    3 hours ago

    Any one from india After seeing m4tch , crazy xyz,🤔🤔

  5. Mason Pearson

    Mason Pearson

    11 hours ago

    *spray the child with 200 degree chemicals*

  6. Demi Green

    Demi Green

    17 hours ago

    Gk Hnkjb

  7. Oskar Matzerath

    Oskar Matzerath

    Day ago

    7:00 Night"mire"? Is he related to @bertkreischer?

  8. Augusto Elias

    Augusto Elias

    Day ago

    Nou ingli españis

  9. Jonas Jakubek

    Jonas Jakubek

    Day ago

    Mark must be the best dad in the world, hands down

  10. Koby Greenzweig

    Koby Greenzweig

    Day ago

    1 Key Ingredient S O A P

  11. Gaming With IronPie

    Gaming With IronPie

    Day ago

    The red ones look like blood human blood in water

  12. Anonda Krein

    Anonda Krein

    Day ago

    KID IN THE BACKGROUND: Well, bye bye camera EVERYONE: SHUT UP !!

  13. Gerhard Vonier

    Gerhard Vonier

    2 days ago

    Unnötes Zeug

  14. Kj Dj

    Kj Dj

    2 days ago

    I love how you go out of your space and your personal bubble just to make us all happy and excit

  15. Dhdh Dhdh

    Dhdh Dhdh

    2 days ago

    8:16 woo

  16. Eduardo Garcia

    Eduardo Garcia

    2 days ago


  17. Ahmad Al-Nahari

    Ahmad Al-Nahari

    2 days ago


  18. dankus memius

    dankus memius

    2 days ago

    Me on December 1st: 0:48

  19. mcbridlle


    2 days ago

    That kid in the window is either depressed or just realised he's ginger

  20. Sunny borah

    Sunny borah

    2 days ago

    These kids are getting the best uncle ever.

  21. A Mephisto

    A Mephisto

    3 days ago

    Potassium iodide Hydrogen peroxide Soap = Elephant toothpaste

  22. _lolbit_


    3 days ago

    He’s that one guy In math problems who buys 500 pounds of soap

  23. Samikshaa Srinivasaraja

    Samikshaa Srinivasaraja

    3 days ago


  24. Funnybunni1012


    3 days ago

    How did you empty your pool after that

  25. Murgisan Moglai

    Murgisan Moglai

    3 days ago

    The round page parallely rule because case individually fence barring a sour group. abject, questionable window

  26. teajacka


    4 days ago

    See how money can buy happyness.

  27. Reynard Hakim

    Reynard Hakim

    4 days ago

    I was eating lays and you showed me coschroack is my worst m ewwww

  28. Reynard Hakim

    Reynard Hakim

    4 days ago


  29. Holy_Crystals


    4 days ago

    0:42 that bug just flew for its life

  30. Anthony Gaming

    Anthony Gaming

    4 days ago

    How does he clean all of this up??????!!!?

  31. Jairus Marvin Leones

    Jairus Marvin Leones

    4 days ago


  32. ShockyBoi!


    4 days ago

    Me wishing they did this at school :(

  33. Raemier Castro

    Raemier Castro

    4 days ago

    Fun fact: mr beast fill a house with elephant toothpaste

  34. Ava America

    Ava America

    4 days ago

    Am I the only 1 who thought whenever they were cutting up in the tarps it was the most sited satisfying thing ever

  35. james Young

    james Young

    4 days ago

    I love how you've opened those kid's minds to possibilities, and science.

  36. Foxer Furry

    Foxer Furry

    4 days ago

    0:43 Was that a Dragonfly!?

  37. FlamingUniverse999 Conquererofthesea

    FlamingUniverse999 Conquererofthesea

    5 days ago

    He says he’s bad at chemistry Me: woah woah woah what is h2o something

    • FlamingUniverse999 Conquererofthesea

      FlamingUniverse999 Conquererofthesea

      8 hours ago

      I’m 9 but nice estimate

    • Doctor Heinz Doofenshmirtz

      Doctor Heinz Doofenshmirtz

      3 days ago

      well you are like 8

  38. Sai tmc

    Sai tmc

    5 days ago

    7:16 this is the time we’re the elephant toothpaste was in pool

  39. Breezy


    5 days ago

    Imagine, Mark accidentally put hydrogen peroxide in the hose and sprayed it on the kids lmao

  40. steph starr

    steph starr

    5 days ago

    That (im Alive) was funny 😂

  41. Thegaming kid1

    Thegaming kid1

    5 days ago


  42. Mediocre Cuber

    Mediocre Cuber

    5 days ago

    Plot twist: he is the favorite uncle they just say he isn’t to keep getting fun, record breaking, and exiting things.

  43. Azapzip Gaming

    Azapzip Gaming

    5 days ago

    Bam 💥

  44. Youngcroissant 45

    Youngcroissant 45

    5 days ago

    The kid who said oh well there goes the camera tried to hard to be in the video and make people laugh

  45. Palminal


    5 days ago

    I hope it wasnt so hot so the Camera in the pool didnt died

  46. Kal Grivakis

    Kal Grivakis

    5 days ago


  47. Kenzie Hansen

    Kenzie Hansen

    5 days ago

    1:17 Hah looks like Barts head XD

  48. ツNsbanwait


    5 days ago


  49. Hayden Stirrup

    Hayden Stirrup

    5 days ago

    Where do you get the potassium iodide

  50. Josh valenta

    Josh valenta

    5 days ago

    ♈️ I am this this is what I am

  51. Max The Man All Over

    Max The Man All Over

    5 days ago

    3.2.1 subway

  52. N!ghtw!ng 15

    N!ghtw!ng 15

    5 days ago

    Maximum Awesome

  53. Soul Fire Dragon

    Soul Fire Dragon

    5 days ago

    Anyone noticed it’s really creepy how uhm mark robber has a bunch of kids to play iwth 😳

  54. מלפפון חמוץ

    מלפפון חמוץ

    6 days ago

    אני הבן זונה ❤️

  55. JemtJem


    6 days ago


  56. Admin Linky

    Admin Linky

    6 days ago

    They taught me this

  57. Isabel


    6 days ago


  58. hiram zambrana

    hiram zambrana

    7 days ago

    6:40 That commercial is perfect to place it at.. gets people to watch what happens next GREAT JOB 🤩

  59. Ĺőđßķä Ğķłœə

    Ĺőđßķä Ğķłœə

    7 days ago

    I wouldn't mind if this guy was my science/chemistry teacher. :)

  60. Amelia Holdsworth

    Amelia Holdsworth

    7 days ago

    Is that the King of random shirt 🤔

  61. Souls DID it

    Souls DID it

    7 days ago

    Wow he loves the king of random

  62. Sma11Fry


    7 days ago

    He is that one really cool uncle

  63. Morgan Collins

    Morgan Collins

    7 days ago


  64. Felipe


    7 days ago

    All I can say is rip that pool

  65. jonathan jc

    jonathan jc

    7 days ago

    Rewatching this again and just notice him wearing the King Of Random Tshirt, what a way to honour a legendary USgone, RIP Grant Thompson

  66. bg se

    bg se

    7 days ago

    The boundless susan impressively please because step-father hopefully flood on a receptive impulse. volatile, dynamic fish

  67. Beg Zayn

    Beg Zayn

    7 days ago

    The abundant class extremely question because loss inspiringly remain around a nonchalant cocoa. shallow, abstracted random

  68. Migs Hang Out

    Migs Hang Out

    8 days ago


  69. Hello


    8 days ago

    That pool have many activities from Science

  70. 晞哥


    8 days ago

    So,you lose a camera XD

  71. Anna Jin

    Anna Jin

    8 days ago

    What are the ingredients and where do you buy them

  72. Pro


    8 days ago


  73. Robert Richards

    Robert Richards

    8 days ago

    Why are you wearing a king of random t-shirt

  74. Lightning Yt

    Lightning Yt

    8 days ago

    Imagine how long that would take to clean up

  75. Chef Panda

    Chef Panda

    8 days ago

    I wish google maps flew over

  76. Jerry Rattanong

    Jerry Rattanong

    8 days ago


  77. Ishika


    8 days ago

    Imagine their cousins every time Mark makes a video-

  78. 4thcouch


    8 days ago

    Cool les vidéo avec moi

  79. Phat Gus

    Phat Gus

    8 days ago

    I phat gus have returned

  80. Canadian Yatch

    Canadian Yatch

    8 days ago

    He said I'm about to get demonitised when he blended fish for sharks my brain is melted

  81. Maira Waseem

    Maira Waseem

    8 days ago

    I'm want to be your student after seeing this and those kids who were watching from the window were like we don't care if it doesn't work we want to jump in the pool

  82. JANGO


    8 days ago


  83. René Diever

    René Diever

    9 days ago

    De politie y

  84. Naim Raza

    Naim Raza

    9 days ago

    This is so funny

    • Ali Hakimi

      Ali Hakimi

      9 days ago


  85. Ethan


    9 days ago

    Nobody: Mark: Talking Background: Bird go ZOOM 0:42 It’s behind marks head just keep looking at his head

    • Ethan


      8 days ago

      Actually I think it’s a giant dragon fly

    • Ethan


      8 days ago

      @Прогноза за времето I will make one

    • Прогноза за времето

      Прогноза за времето

      9 days ago


  86. Stefan Adrian

    Stefan Adrian

    9 days ago

    It must be so cool to have mark as your dad

  87. Прогноза за времето

    Прогноза за времето

    10 days ago

    I like how when you scroll down to the description the 1st thing you see is "I'm not a chemist." 😂

  88. Adam Malas

    Adam Malas

    10 days ago

    bless the kid who said RIP camera

  89. Evan Weber

    Evan Weber

    10 days ago

    Who heard the kid say "Well, goodbye camera"

  90. Top random vids

    Top random vids

    10 days ago

    2:35 r.i.p camera

  91. Alexfartn


    10 days ago

    Check out the one he made for a kid with a tumor

  92. Florence Hayles

    Florence Hayles

    10 days ago

    Your in the 2021 Guinness world record

  93. Lutz Teichmann

    Lutz Teichmann

    11 days ago


  94. Creator


    11 days ago

    Mrbeast: ima bout to end this mans whole career

  95. mark bremer

    mark bremer

    11 days ago


  96. Radioactive Elephant 🧣

    Radioactive Elephant 🧣

    11 days ago

    I've just realized I've done this before. But a really small scaled one.

  97. Edward Langston review

    Edward Langston review

    11 days ago

    He is the coolest uncle

  98. Ariceli Coelho

    Ariceli Coelho

    11 days ago

    not the bigest

  99. Pp Productions

    Pp Productions

    11 days ago

    “I shelved my revenge plane and showed them what could have been their fate” -some science guy

  100. Maxwell Mintzmyer

    Maxwell Mintzmyer

    11 days ago

    How do you make elafint toothpaste