Masterpieces 300 Piece Ez Grip Jigsaw Puzzle Donut Resist 18''X24'' Neuroplasticity in Early Intervention Therapies for Kids Blog. MasterPieces is a local USA Arizona based company that creates puzzles for both children and adults specifically for the avid puzzle fan! We are proud to feature images by popular artists, your favorite sports teams, and stunning photography. We design our puzzles to offer a higher quality puzzling experience. When you choose MasterPieces, quality isnt just a promise, its our guarantee. Our puzzles are developed using a unique random cut pattern for every puzzle, thick recycled material, and environmentally friendly soy based inks. Jigsaw Puzzles make the perfect gift for anyone who enjoys a relaxing evening or a mind bending challenge! Our high quality packaging will let you save, store, and enjoy your puzzle for years of puzzling fun.