More Halloween sensory play! Fill up a big bin with either homemade cloud dough or a couple boxes of cake dough. Then add in some measuring cups and Halloween fun (candy corns, plastic bugs, Halloween erasers, etc.)
I also had a nifty little plastic half of a pumpkin thing that my daughter used to make Halloween cloud dough cupcakes with candy corns in them. This could also be done with silicone baking liners.