About this 3D model

(This thing got featured in the thingiverse blog: http://blog.thingiverse.com/2011/05/30/this/ )When my daughter saw this thing ( http://www.thingiverse.com/thing:8859 ) she wanted to take the pieces off to have the "X" and "O" to play with for Tic-Tac-Toe. Since I had been messing with a case ( http://www.thingiverse.com/thing:8860 ), I decided to try to mash them together into a little travel Tic-Tac-Toe game.There is a little video of it building here:http://www.youtube.com/watch?v=nRKHwylv1MsThis is an original work, but is similar to:http://www.thingiverse.com/thing:7614http://www.thingiverse.com/thing:8881http://www.thingiverse.com/thing:8364