This is a super simple project that has been a huge hit. Here's a quick overview. Check it.

Our nephew wanted a TechDeck half-pipe for his birthday this year. We thought we'd kick it up and build him his very own real concrete fingerboard bowl park. The goal was to create a unique park from materials we had on hand. At 60 lbs., this park weighs a wee bit more than our nephew.

tub/form (we used scrap 3/4" plywood and spray glued some plastic film to it)
ready-mix concrete
spray silicone or some type of mold release
and of course, duct tape

Step 1: 1. Create the Form

Create a negative mold of your desired park shape.

We built a tub from scrap 3/4 plywood and spray glued some plastic film to it. To create the bowl shapes, we used 1 larger wooden bowl and 2 smaller glass bowls. The transitions/gaps where shaped from a few chunks of styrofoam and duct tape.

Note: The mold needs to be smooth, so the concrete can release when cured.

We used caulking to make smooth transitions and rounded corners. Use your finger and a little water to smooth out generous beads/globs of caulking. Let the caulking dry overnight before pouring concrete.

Step 2: 2. Pour Concrete

Mix and pour the ready-mix concrete.

We used a full 60lb. bag of basic post concrete mix since we had that on hand. It worked ok, but cracked because the form was too thin (specs state minimum of 2" thick). The trick to a smooth final finish to knock all of the air bubbles out. We tamped everything well with a small stick. Then we beat on the outside of the form with a hammer. You will see the bubbles rise to the surface. Let sit for at least 24 hours. (we rushed it and cracked the main bowl. as an easy fix, we glued the pieces to plywood with liquid nailsback in business)

Step 3: 3. Remove Form

Carefully remove your form. If you have any cracks or bubbles, fill with non-sanded grout or other concrete patch/filler.

Add the finishing details like:

Step 4: 4. Shred!

"Cannon Ball Park" in action:

I love this, inspired
that is for play with Beyblades YA-HA!!!!
that's a great idea! thanks.
Very good job, Nice deck!
Nice one. Five stars!
did you make the banana board tech deck or buy it? plz respond
it was purchased
where and how much?
target/ toys r us for like $5 but idk if they still carry them
sorry I don't know. it is my nephew's.
o ok thanks anyway
Excellent Instructable. Great choice of Concrete :)
awsome looooool
Reinforcing it with mesh would help. Use poultry netting or hardware cloth, shaped to follow the contours on top. When pouring the concrete, make sure the mesh/netting is not in contact w/ the mold, so it won't show in the finished product.<br>Another layer of mesh along the bottom, and/or some rods, to reinforce it from the bottom as well.<br>One way to use less 'crete, (and make it lighter too,) is hide chunks of Styrofoam in the thick parts. Just make sure they don't surface when you tap the mold during the air-purge routine. Tying them to the mesh may help. Another way is to screw small boards across the top of the mold, with legs holding down the Styro-chunks thru the 'crete. When done air-purging, unscrew said boards, remove the legs, and fill in their &quot;footprints&quot;.<br>Or let the Styro-chunks surface (cut holes the bottom re-mesh for this), and remove them after the 'crete's set.<br>If you wish to reduce the amount of 'crete needed (or get more volume), but don't care about weight, use rocks from your backyard in place of the &quot;Styro-chunks&quot;.<br><br>You can make your concrete a different color by using pigment. Pigment may be pricey, so you may want to leave that out.<br>http://www.directcolors.com/concretepigment/<br>or buy it at a hardware store.
lol looks beast
dude this is freakin awsome, think you could make anything else out of concrete?
were did you get that wicked 80s board?!!??
<p>Wonderful work masters just wondering how heavy is the concrete park?<br /> This would be a perfect excuse to buy a tech deck!! =)<br /> <br /> Thank You<br /> &nbsp;</p>
&nbsp;thts pretty sick!!<br /> <br /> <br /> &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-M<br />
You guys rock. One of the best instructables I've ever seen......I love those Banana Board or Old School Skateboard TECH DECKS!!!
I have a banana board for sale 15$ 5 plies of veneer, cross plied, 3 birch, 2 african mahogandy
&nbsp;ill by it <br />
ok. how and where?
You can have it DungMachine<br /> But seriously I want one of those!
this is so cool just finished making one<br />
&nbsp;right on. i'd love to see photos. can you add a pic to the comments here?
<p>hey this looks good, i like it :D</p>
&nbsp;nice like rice
did you pour the concrete again and a bit thicker? seems like making the mold is most of the work.
can you buy me a tech deck
i got like, 10 for $2 each at Toys R Us in the bargain bin, i don't think you need people to buy them for you&nbsp;:\<br />
buy 1 ur sen
too hard
&nbsp;what did you expect? Great instructible!
10 years ago or so, I had a tech deck with the trucks removed and the bottom coated in felt, so I could play with it in school. (:
I like it. I would make it. if only I had cement...
very cool if u have the cement
some steel reinforcement would have helped, but i guess you know that by now.
yah concrete is strong ... vertically ... week horizontally with out rebar
That's an awesome song in that video.
wow you guys are geniuses. that looks really fun and would be killer with a few rails.
yah use some bent metal rod
The concrete probably cracked because it was not watered...You have to pour water over concrete as it cures.At least that was what my grandfather who used to be a contractor.
that is correct, the water cools the concrete making it cure slower making a better whatever it is you are making:)
I did not know <em>why</em> the watering helped,so thanks.<br/>
how mutch did I weigh??? I'm going to build one but I don't want it to be too heavy.
it is a full 60 lb bag of concrete

About This Instructable




Bio: photographer. designer. maker.
More by peterthomsen:GoPro Magnetic Mini Ball Head Mount Concrete Fingerboard Skate Park 
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