Chomp is a brilliant project by Korean designer Mirim Seo that's designed to teach kids about different food chains.
Chomp puzzle books introduce five different ecosystems and their food chains: forest, ocean, arctic, jungle, and desert. Each food chain includes producers, consumers and decomposers, with the completed puzzle showing the role of each of its members through a visual representation of the eating process. While it's currently only a prototype, Chomp is one of those great products that I really hope ends up in production. You can read more about it on Seo's website.