This was something I designed because we used to have one with our magic kit, but lost it. My daughters were asking about it so we designed and printed one on a MakerBot Replicator 2.

Here is a video demonstration of the process I used to design and print it:

http://www.youtube.com/watch?v=GaO9g0v_QYI

and if you want to learn how to master the coin paddle then check this guy out:

http://www.youtube.com/watch?v=l00j2xcnoG4