ThinkFun Block By Block GameCreative Building Logic Game Block By Block expands your spatial problem-solving skills as you combine seven puzzle pieces to construct three-dimensional structures depicted on the 60 challenge cards. The puzzle pieces are the same as the famous Soma Cube of the 1970s. This logic game is tough and very fun! This one player brainteasing Logic and Problem Solving Game is best for ages eight and up.Features:60 Challenge Cards with Hints and Solutions7 Puzzle PiecesGame-Go BagNot for suitable children under three years old due to small parts, keep out of their reach.