George Washington based brain teaser puzzle. Part of the Great Minds collection by Professor Puzzle Aim: Apply your own strategies to find the best solutions for these 40 river crossing and formation puzzles. Set contains 1 wooden tray, 2 metal General Washington coins, 4 wooden General Gates coins, 4 wooden General Lee coins, 40 puzzle cards, and 2 instruction cards. Part of Professor Puzzles Great Minds a suite of 3D Puzzle / Brain Games based upon histories best minds.