Green Goblin Goo
1 C. cornstarch
1 C. baking soda
1/2 C. water
green food coloring
The boys played with this forever and even though they ended up dumping it all over the counter it was fairly easy to clean up.
Messy, but not nearly as messy or time consuming as carving. Plus, the pumpkins last way longer.
Decorating sugar cookies.
Bear just wanted to eat anything he could get his mouth on before we would stop him, but Bug stood and decorated every last cookie all by himself.
Nothing too messy a good tub can't take care of.