The Rainbow Works Mount Rushmore National Parks Puzzle is a fully interlocking puzzle with 500 pieces, featuring vibrant colors and a landscape theme. Made of sturdy cardboard, this puzzle is suitable for ages 10 and up, appealing to both boys and girls. With a puzzle size of 15.5 x 18 inches, this United States-made puzzle is a great addition to any jigsaw puzzle collection, offering a fun and challenging activity for National Parks enthusiasts.