With Puzzle Doubles! Glow in the Dark- Dino puzzle, learning about these extinct animals has never been so much fun! After assembling this 100-piece puzzle, turn off the lights and watch it glow in the dark! Puzzle Doubles! Glow in the Dark! puzzles are a fun way to expand your knowledge or different environments. Your child will be amazed by the lively illustrations and prehistoric skeletons! This puzzle measures a giant 3’ x 2’! Ages 3+ years.