Quercetti Georello Kaleidogears from International Playthings. Kids will have a blast putting together and building various mechanisms with these colorful gears. No batteries required! Children just use their creativity and imagination to build hundreds of different variations and be amazed as they spin the wacky gears in motion. Great for developing problem-solving and logical thinking skills. Set has 52 pieces, including 3 different-size meshing gears and interlocking plates. For ages 3 years and up. Click on the video below to see a demonstration of the gears in motion!