This is my first instructable... If you see anything that is missing, or should be explained further, please let me know. Comments, suggestions and ratings would be appreciated.
Step 1: Gather up the parts
Some kind of "board"... I used a sheet of MDF cut into 3 12x20" pieces
2x4 - 4 pieces @ 12" long
Some screws to attach the board to the MDF
Some kind of "pin" to attach the board to each other - I used 8 rivets
Step 2: Attach the 2x4's to the boards
Step 3: Drill small holes to mark where the pins will go
On the one that doesn't have 2x4s on it, carefully measure in 1 1/2 inches from each corner and drill a very small hole. Using this board as the "master", line up the board on to of each of the other boards with 2x4s (see picture) and drill into the 2x4's and then turn it over and drill into the MDF as well.
The point of all this it to make all the holes universally spaced on all three pieces.
Step 4: Put the pins (rivets) into the 2x4's, make other holes bigger
You will also need to make the other holes bigger now. Using a drill bit slightly larger than the head of the rivet, make all 6 holes in the MDF big enough for the rivets to go in.
Step 5: Put it all together
You can make as many of these pieces as you want to make it as high as you want. With these three pieces, it ends up being about as high as a regular set of stairs step.
I use this on carpet, but, if you are using it on laminate or hardwood, you will want to put some rubber pads on the bottom so it doesn't scratch the floor.
The rubber pads on the bottom of the balance board are very good and it does not move from the top of the riser.