These crayons designed by Ryo Shimura will delight kids and adults alike. Kids love the fact that their crayon is also a toy they can play with. Actually, it’s as good as a set of six hippo toys in different colors. Adults are wowed by the clever design. The set of six hippos which are flat on the bottom can just lounge around on your desk or drawing pad when they’re not in use, looking like they’re wallowing in an African watering hole. The effect is uncannily real, with the hippos in a group showing only their snouts and the top layer of their body visible. Oh, and you should know that a portion of the sale proceeds go to an environmental cause.