Oftentimes younger children miss out on the fun of jack-o-lanterns, because they are too young to handle a knife. A toddler can scoop pumpkin guts, and draw a face onto a pumpkin, but then the rest must be handed over to an adult for the actual carving.
Here's a safer option. Pumpkin Painting. Think of how much fun your child will have designing a pumpkin from beginning to end. And, don't stop with pumpkins. Paint gourds, too. Simply put an old t-shirt on your child, get out non-toxic paints, head outside so you don’t have to worry about the mess and he'll go to town.

Easy Pumpkin Painting