This project was SO easy and inexpensive! Home Depot, Lowes and many other hardware stores will actually CUT a piece of wood for you to any size you want!
I simply hot glued all the track together and glued it onto the board. Pull it out to play and slide it under when you are done! This would work for a whole host of other play sets too!
Check out my blog at: http://clutterbug.me/my-blog