1. When you're playing the pieces just lock in place so you don't have to worry about keeping the game flat. (this system is made by Daniel662000)
2. Clean up is easy you just put the pawns in the holes.
For the ones who don't know what Tic-Tac-Toe is: Here's a link to the Manual of Tic-Tac-Toe (Wikipedia)
Have fun with building/playing!
Step 1: Parts list
If you don't have the 4 long black rods, they could be changed for 4 silver or gold rods. They're just like the white rods used as pawns.