What you will need:
Rubber tubing (1/4 latex hose. You should probably use 3 ft. I used 2 ft and it wasn't enough. I found some in the plumbing aisle at Lowe's)
Glue (Anything that will bond wood and rubber, I used Gorilla Glue)
Binder (normal 3-ring binder)
Step 1: Cutting the Wood
Cut 4 pieces like these. Approx 1 1/2" x 1 1/2" L-shaped pieces.
Step 2: Putting It Together
Stretch the tubing around your device to figure out where the corners should be placed. Glue each corner to the tubing. Once the corners are dry, glue them into place in your binder and let it dry.
Step 3: You're Done!
Now it should hold the iPad in place.