This Puzzle Double Series Takes The Concept Of A Traditional Puzzle To A Whole New Level! After Putting Together The 100 Piece Puzzle, Turn Off The Lights & See A Surprise As It Glows In The Dark 100-Piece Puzzle Double! After You Put The Puzzle Together, Turn Off The Lights & The Puzzle Glows In The Dark! in addition Turn The Puzzle Over & You Have A Coloring Activity The Bright Illustrations Encourage Parent-Child Conversation