Kodomo Challenge Step (for 4-5 year olds) Slider Go Go! Assemble the parts and learn about the differences in speed and movement based on the rails and heights, fostering logical thinking skills. There are some scuffs from use, but it's still in good condition. It's fun and exhilarating to run it with all the parts! Please check the images and understand that this is a used item. Popular keywords: Kodomo Challenge Character: Shimajiro