PUZZLE SORTER: Make your puzzle building experience more enjoyable by organizing puzzle pieces by your favorite system: color, theme, shape, etc. The perfect tool for the dedicated puzzler! 6 STURDY CARDBOARD TRAYS: Get a better view and easy access to all your pieces by keeping your pieces sorted and your work area neat and safe from losing stray pieces. SORT & STORE: The stackable color-coded boxes allow for easy and convenient puzzle-piece storage and transportation. With your pieces smartly organized and stored, you can save your work for later. FREE MYSTERY PUZZLE: Let the fun continue and discover the free mystery puzzle packed inside with each Puzzle Sorter! The bonus puzzle is suitable for ages 12 and up. SPECIFICS: Product dimensions: 10 x 12 x 2 inches. Made of recycled materials. Every White Mountain Puzzle product is proudly manufactured in America with a 100% customer satisfaction guarantee.