18 months & up. Hands-on fun at any speed! Turn the gears slowly and watch the interlocking gears move to make the caterpillar crawl. Children can rotate, remove, and rearrange the colorful gears. Includes six interchangeable gears on a wooden base. Encourages imaginative play. Helps promote hand/eye coordination, color recognition, and fine motor skills. Measures 2" x 14.5" x 4.5" (assembled).