One of the world's greatest brainteaser puzzles</br>Put the two pieces together to form a pyramid</br>Do it with just two puzzle pieces</br>Three hint cards help you get to the "Aha" sensation of solving a great brainteaser</br>Learning skills:  logic?? deductive reasoning?? abstract thinking?? spatial relationships</br><br/>http://www.amazon.com/gp/product/B000GHZ0Z2