Oh I bet your granddaughters would love to decorate a tree! When my kids were little we used to make homemade bakers clay ornaments together. We would shape them, bake them, let them cool, then paint them. They last forever too. They get hard as a rock when u bake them.I’m debating on a tree. If I can get a good sale deal on a medium size artificial tree, I’ll get one. I’ll have granddaughters the week before Christmas so decorating a tree would be fun.