Ah!Ha Games Interlockpuzzle game Each building block of two cubes has a pin and a hole in a unique place. You build the shapes by putting each pen in the hole of the next piece. Once you've solved the puzzle correctly, each pen will stick into a hole and no more pens or holes will be visible. Specifications: Color: multicolor Gender: junior Material: plastic Language: Dutch, English, French, German Number of players: 1 player Number of challenges: 50 Package dimensions: 22 x 22 x 5 cm (L x W x H) Age: from 8 years Contents: 1 Game board 12 Building blocks 50 Challenges 1 Solution booklet