DIY Water Slide




About: I like making things out of items that would have otherwise been discarded. Check out my other projects!

Every year our school has a sports day during the last week of school.  This year I built a water slide down the school's front steps as one of the activities for the kids (and adults) to enjoy.

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Step 1: Materials Needed

The exact material list will largely depend on your site.  Modify this list to meet your needs.  The most important ones for building on a set of stairs are the four Ps...
  • Plywood - You need some rigidity and a little flexibility.  Not too thick, not too thin.  Goldilocks would pick this thickness.  Somewhere around a half inch should be about right.
  • Padding - I was very lucky to have interlocking closed-cell foam pads that are about an inch thick.  You could use carpeting, carpet padding, camp mattress pads, the interlocking alphabet children's mats... With some time you can find something and with a budget you can buy something.  You also may need some padding with some higher friction to get people to stop; like an old mattress.
  • Pool noodles - small, giant, LED lit, glow in the dark...
  • Plastic sheeting
  • Tape
  • Garbage bags
  • Stairs
  • Hose and water   

Step 2: Build It - Transitions

The first step of building a water slide is to channel your inner 14 year old and consider the transitions.  Well, maybe we should back up and consider our audience first.  What age will most of the participants be?  What is their willingness to get some air, crash, tumble...  build for that.   

You want to minimize the chance of injury.  Safety first!  Support any areas of the ramp that need it (see the padding below the plywood).  Use multiple layers if you need to.  You may want to use screws to secure the plywood to lower layers.  We taped the top layer seams of the plywood to keep things from slipping around.  We also secured the plywood so it wouldn't slide down.  After over 400 uses it still sat strong!

After you have the ramp built, pad it with your padding material.  You might want to go wider than the ramp itself just in case.  Out of the hundreds of uses we had from kindergarten through adult, nobody went off the water slide and was injured.  But accidents happen!

Step 3: Build It - Bumpers

Tape the pool noodles together to make a long continuous bumper for each side of the slide.  Pool noodles work great because they are soft, cheap and flexible.  You could use PVC pipe, rolled up carpeting or other things as bumpers too.  This helps contain the water and the rider.  You'll need one for each side... or three to have two runs next to each other for races!

Step 4: Build It - Plastic

Lay out your plastic on the ramp.  Cover the length of the ramp with one edge of the plastic along where you want the pool noodle to be.  Think of the profile of the ramp plastic looking like an S.  You want the pool noodles to lie in the hooks of the S.  (The best way to illustrate this is with a crude drawing.)   Lay one noodle bumper on the plastic and fold it over.  Lay the other noodle on and fold again.  Then tuck the remaining plastic underneath.

Step 5: Use Plastic to Go Faster

We found that by sitting in or on a garbage bag or other plastic that the ride was much faster.  It didn't prevent people from getting wet - many didn't have swim suits.  But the ride was quite fun this way! 

Step 6: Run It Safely!

It is important for the slide to be safe so that everyone has fun.  If your slide will be used by many people, take a page from the professionals and have someone stationed at the top and bottom.  Be sure the landing area is clear before the next person goes.  We didn't expect to slide so far on ours so had to build padding around some fencing.  Next time we'll make sure there is more space.  We also might make a wider run - perhaps 8 feet wide instead of 4 because some kids really wanted to do spins and experiment with tricks when going down.

Step 7: Have Fun!

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    16 Discussions


    3 years ago

    Great instructable - and the photos made it even better! Thanks for sharing!


    6 years ago on Introduction

    Aside from that being entirely awesome... you're in Mongolia? How long have you been there? How is that going for you?

    5 replies

    Reply 6 years ago on Introduction

    We have been working here for two school years. Headed back to Alaska in three days and then in just over a month we're headed to Chennai, India for at least two years. Lucky for me that India is included in all contests!


    Reply 6 years ago on Introduction

    The travel is a huge benefit. I'm actually not even a certified teacher (yet). I don't work at a school that just teaches English. It is a full Pre-K-12th grade program with everything from Art to PE. Perhaps an Instructable on how to get an overseas teaching position would be good to write!


    Reply 3 years ago

    this is what it's all about... making something for kids' entertainment with your bare hands and knowing that YOU made those kids' day. if big kids love it too (adults) then its epic. i always start projects and end up with 100 unfinished projects, but I find myself latching onto the projects I think of for my son and nephews and won't stop til I see them enjoying my creation. To me, that's what a man does, and what life is all about. Much respect to you brother, great work. and thanks for sharing the idea. next summer my mom is going to kill me because of the slide going all the way across her acre yard into the pool.


    Reply 6 years ago on Introduction

    That would be an awesome ible!
    I've been meaning to get in on that kind of work, but I've always had a hard time figuring out which programs are good or bad, and so on.


    5 years ago on Introduction

    Awesome guide! This is a great way to spend my summer :D

    we have a nice sloping hill in our pasture, so i might have to try this! thank you for posting this! its nice to see that diy people aren't just corporate zombies


    6 years ago on Introduction

    So much fun! Good for you! I want to take a turn! Also, a really nice Instructable and Steadicam work! :)


    6 years ago

    The only thing I could think about when I saw this was big stair sets and hills on my campus


    6 years ago

    Wow that looks like fun!