You could buy acrylic paint and paint a face on the pumpkin rather than carving it. You could also do what's called paint pouring or paint marbling, where you pour different colors over the top of the pumpkin and let them run down the sides to get a drippy effect. There's special paint for that. Lastly, you could buy tissue paper and cut it into small rectangles or squares. Then, you just put a thin layer of Mod Podge on the pumpkin and attach the pieces of tissue paper to the pumpkin like that.