This puzzle proves that brain outdoes brawn. With the proper method, this tricky and clever puzzle can be solved in just one second - exerting more the force of your mind than your muscle to release the square trapped between the X. But don't be tempted into thinking it is easy – you'll need to flex all your puzzle solving neurons for this one – be warned: simple solutions sometimes involve very complex thinking! Dimensions: 7 2/3" x 7 2/3" x 3 1/7"