My two youngest kids are also busy creating and experimenting!
(what do you want with a mummy always crafting :-)
Cutting paper, for instance, just cutting paper, maybe they will make a mosaic out of it, but now it's just the fun of cutting, ah well, the exercice makes the master!
My son is a lot into drawing lately: look how cute his knights are, with a helmet and very big dangerous teeth!!!! And there is one with three arms (or is it a sword?)