• Have you got the brain power to solve this challenging puzzle? • One by one, place the additional seven blocks to form a square. • Challenge yourself and your friends to finding as many different solutions as you can. • It\'s not as easy as it looks! Choose a coloured block to begin with and one by one, place the additional seven blocks to form a square. Challenge yourself and your friends to finding as many different solutions as you can. Makes a lovely gift which is very hard to put down. Watch out - everyone will want to have a go! Additional details: Packaging size: 100mm x 88mm x 10mm Recommended age: 6+ Number of players: 1