Liquid Sand Hot Tub- Fluidized air bed

Water filled hot tubs are soooo 2016.
Go to and use promo code “MarkRober” for $50 off any mattress. They’re super dope.

By popular demand I have shirts now! I picked the high quality shirts and make $0 on all items which is why they are priced handsomely.

Build info:

0:17- I’ve got no info on this song. Sorry.
1:40- Cereal Killa- Blue Wednesday-
2:54- Danijel Zambo- Devil in Disguise
3:25- Keep on Trying- Andrew Applepie-
4:50- Berlin- Andrew Applepie-
6:20- Cereal Killa- Blue Wednesday-
7:20- Pata Pata- Matt Cherne-
8:45- Q- Blue Wednesday-
9:37- Too Happy to be cool by Notebreak-

Summary: Fluidized beds are used in industry for various reasons. They also happen to be really cool to play with and swim in. I made a liquid sand hot tub by adding air in just the right way.



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






legend you says:

i disliked tis video because it made me remember that i have a science test tomorrow
And it ruined my day

Clayton Hudson says:

I like how the bird looked like it hit a window, and then sunk.

EXEJON says:

Anakin Skywalker disliked this.

Jon Bee says:


Erikboyz says:

At 7:51 it would of been f*cked up if they would of turned the air off…..

fxq. co says:


Roxyrocco - says:

I under sand every thing

Slown GamePlays says:


Raportagens Einhorn Buttercreme says:

4:22 …TOO LATE!…

Kelly Gabriela says:


Vanessa Jackie says:

My dad showed me this and said to like it

Vincent Pandraud says:

Op 7:21 ik had de dag vandaag gezien (December 4 2017)

MPRF12345 says:

“accidentally” 5:23

Hi Bye says:

You just earned yourself another subscriber

RedWood Assassin says:

Pls work with King of random

Simon_M1 says:

My favourite part was the explaination

normalnywariat88 says:

Best thing i see from a while!! Great!! Thanks :-)

Savage king devyn The 1st says:

Spin flame lebra Flame lebra is a bablade probaly. 3-4 on ebay

Jack Rivers says:

So satisfying

miss Venus says:

Dude it said $50 off *any* mattress, I tried on the twin essential and it said it was cheap enough ($350 AUD!) like *come on*

Brandon Burns says:

Just watching this video and I have sand in my shoes

S i m p l e says:

In later news *_water is wet!_*

Alexis Sanchez says:

Thumbs up on this comment if you saw the rainbow

Kieren Mccosh says:

Poor pidgeon >:(

Akiraspin says:

Rip birdo.

Henokh ipurnama says:


Hey it's Rilou says:

Hhhmmm I wonder what the hamsters will think of this

Trini Vázquez says:

3:18 who saw the rainbow

Nghi Phúc says:

Rainbow at 1:35

HardcoreYTツ says:

where did you get that sands and is any type of sand possible to use

Alediy gomer says:

Question. Does the buoyancy effect happen with things deep under water? If a ballon is let go into the air it will eventually stop. But what happens if you were to throw a bowling ball in the deepest part of the ocean? Obviously it would explode after a depth but does it slow down or stop?

LeakyScorpion says:

8:13 turns off air…

Thomas Gaming says:

0:28 is that malk? <3

Eren the one gamingz says:

That’s so cool

Revis says:

You are absolutely demolishing that quest to be the favorite uncle. The other uncles in the family are probably going to revolt soon.

Erikboyz says:

Is there a beach like this? If it is I will be scared to go to it because if the air stops flowing then me and other people including beach balls and umbrellas will get trapped!

adking_ hotzy says:

Im stastify

Nagisa Shiota says:

Around 1:30, when he throws that softball in the sand made a rainbow

Another Guy says:

Casper is not affordable because it is overpriced from the start, regardless of any sweaty, price-haggling, commission based middleman that might take his cut.

FantaSammyQc says:

Bad pool. Can’t pee in this one.

Kaios 30x30 says:

How can you measure the buoyancy force

Andrew Zhang says:

If this was deeper this will be a death trap in disguise

Ruby M says:


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