Under the Sea: 100-Piece Floor Puzzle sea life, undersea Another great toy from Melissa & Doug for early childhood. The colorful, exotic world of the ocean depths is beautifully portrayed in this educational floor puzzle. 48"L x 18"W when complete, finish the puzzle and your loved little one end up with a masterpiece of artworks to display. Encourages hand-eye coordination, spatial reasoning and problem-solving skills. For age 6+.