Put your skills to the test with this glow in the dark jigsaw puzzle with a bonus hidden images game! When you have completed the puzzle, turn out the lights and watch it glow! Glow reveals hidden images in the puzzle, adding a new layer to this entertaining challenge! 500-piece puzzle measures 18 x 24 inches when completed. Thick recycled puzzle board and random cut pieces ensure a tight interlocking fit and create a fun experience.