Discover a new dimension in cool puzzles with the latest innovation from Ravensburger - Puzzleballs. Puzzleballs are truly an innovation in jigsaw puzzles and the latest trend for puzzlers. Each perfectly crafted puzzle piece is created to fit together to form a solid smooth puzzle ball. No glue is needed and the 3-D jigsaw puzzle pieces join together to create a perfect 3 dimensional sphere when completed. No seams or edges. These puzzle balls are works of art! Ravensburger is known for quality puzzles and innovative puzzle products.