Instructables
Why buy a little kiddie pool when you can make a cooler one?
The Tyvek I used is from a 10' wide roll. 
The pool will be about 7'x7'x1'

You will need:
4 - 8' long 2x4's
4 - milk crates (or something like a milk crate)
Bunch - Screws to hold the 2x4's together
Staples and Staple gun
Oh and a big piece of Tyvek (I used 10'x10' piece)

Step 01:
Staple one edge of the Tyvek to a 2x4... all along the edge (ever 6"). 
Roll 2x4 till Tyvek is wrapped around the 2x4 one time.

Step 02:
Repeat Step 01 on the opposite end of Tyvek

Step 03:
Set out the milk crates in a big square (about 7'x7')

Step 04:
Set the two unused 2x4's to make the top and bottom of the pool

Step 05:
Set the two 2x4's with the Tyvek on top of the other two so you have a big square with the  2x4's

Step 06:
Get in the center of the pool and flatten out the Tyvek so that it goes all the way to the corners. The walls need to be straight up and down (not tight, water will rip it apart)

Step 07:
Measure in about 6-8 inches on the ends of the 2x4's and screw the ends together (See pic)
Lay the two naked edges over the last two 2x4's and staple the Tyvek

Step 08:
The Tyvek rips really easy with the staples so use lots. I also found that if you put a piece of cardboard over the Tyvek and staple through that... it helps a lot with ripping.

Step 09:
Start filling with water and attach the milk crates to the corners of the 2x4 square. If the milk crates slip out from under the 2x4 edge... a lot of water will flood your yard.

Notes:
Make sure you have as much Tyvek on the ground and the edges are pretty straight up and down. You don't want to hammock the Tyvek, use the ground to hold the weight... the Tyvek will just hold the water in.

If it's to cold for you... put something dark in it when you arn't playing... I used a dark blue yoga mat... this will heat it up faster than just the sun.

This pool will last about 5 days if you are nice to it... if not, considerably less.
Abnar2 years ago
Great post to make tyvek pool and like to say tyvek is great option especially if you happen to live in an area where the mercury tends to dip often. Swimming is great healthy activity for people of all ages.
silveravnt3 years ago
Thank you for sharing. Do you happen to have any pictures of how the 2x4s are fastened together?
bigtreehouse (author)  silveravnt3 years ago
Laid one on top of the other and used a screw...nothing fancy. To keep with the dimensions... You want to have 6-7 inches sticking out at the corners (8 foot boards)

I will work on pic.
bruc33ef3 years ago
(removed by author or community request)
bigtreehouse (author)  bruc33ef3 years ago
No on the pond liner. The tyvek starts to shed (Little white strings). After a couple days the Tyvek gets... weak. My little pools last about a week then the Tyvek dies (Rips and spills all over)

Good for little pool but won't work for anything wet for long term... sorry.
You didn't mention that the Tyvek lasts less than a week. That hardly makes it worth it. Maybe, as I8nite says, the poly tarp is the way to go.
bigtreehouse (author)  bruc33ef3 years ago
the line that reads, "This pool will last about 5 days if you are nice to it... if not, considerably less." isn't clear?
l8nite3 years ago
a poly tarp works for both a pool and a pondliner although the one I used to line a leaky hard plastic pond, broke down after a couple of years... noce ible from a gr8 dad !