One of my favorite blogs is this one: engagetheirminds
I love a lot of her ideas, but before I read this I hadn't heard of S.C.A.M.P.E.R. before. I think it's a great place to start if you are new at trying to challenge your kiddos.
stealing using that idea I asked the kids to come up with something we could use to make snow (other than, you know, snow...which several of the kids really did write). Here's what they came up with:
Not sure he thought that one through....:)