These MasterPieces 15" x 21" 500 piece Hidden Image Glow-in-the-Dark Puzzles features magestic unicorns near a beautiful waterfalls and floral scenes, each with special, hidden animals or objects, some of which glow-in-the-dark, and others who hide in plain sight. Artist, Steve Read hides amazing hidden images within each beautiful piece of art, and his puzzles never disappoint. Find all the secrets in these wildly entertaining puzzles! To reduce their impact on our environment, the chipboard used in these puzzles is made of recycled material.