This puzzle game has sold over 4 million units worldwide. It includes more than 300 2D and 3D puzzles ranging from beginner to advanced difficulty. Players start by placing the indicated pieces, then determine where and how the remaining pieces fit. Designed for ages 8 and up, it helps develop problem-solving, reasoning, and spatial skills. The compact size makes it travel-friendly. Suitable for kids, teens, and adults, it works well as a gift or personal challenge. The game has received industry awards for its engaging puzzle mechanics.