Easily one of the coolest toys i never had as a kid. Basically the kit has some pieces of cardboard that you arrange and then pour the magic water on. Over 6 hours these super fine crystals grow on the saturated cardboard. When it's done it looks super cool, but has the durability of a dust bunny. Nevertheless, Bunny and i had a blast growing this set. I totally want to grow a forest out of these things.