Trace your child's body and let them paint inside it. They can be interested in drawing internals (heart, veins, stomach, etc.) or painting beautiful dresses or faces, or making themselves a cartoon characters.
The child can as well trace the hand, or the foot, or any other part of the body and try to create a new character.
Look how many animals you and your child can do from finger prints. Such painting is one of the best ways to develop creative thinking.