Easy to use 3D game design software designed for kids in mind. Hey we already have scratch for kids to make simple 2D games with, now they can make 3D stuff too.
It does have some nice stuff in it, but I think once someone gets experienced in other game engines, this one would look a bit like a kiddy tool. But this would be great software for kids to get their feet wet in 3D and game design for the first time. And then go to other more challenging engines like our beloved BGE.