Some people have asked a few questions about this Play Center. The plans are from WOOD Magazine December/January 2005/2006 (issue #167) page 76. I used a Thomas the Train Board that was pre-painted with rivers, lakes, forests, etc.. (I got the board from a hobby shop that was going out of business). I re-sized the Play Center plans from WOOD Magazine to accomidate the board. The overall dimensions are… 33.5" x 49.5" outside by 32" x 48" inside (the size of the board). The floor to top of rail is 19" and the floor to top of board is 16.75". The wood I used was Hard Maple. I hope this helps everyone that may be interested. Enjoy!