The Wooden Interlocking Blocks Puzzle from Fisher-Price lets kids stack, sort and build all kinds of fun designs. Made with wood from Forest Stewardship Council-certified sources (FSC-N004566), this colorful puzzle includes 19 shape blocks for kids to stack in free-play or sort into the tray, which features guidelines to help kids create the interlocking design. As kids stack and sort the puzzle pieces, they'll be exercising their hand-eye coordination, creativity, and problem-solving skills. Colors and decorations may vary.