This technique of doing seals It is very original, since you can customize it and limit your imagination.
Cut in foam the figures you want with the help of scissors. Stick them as you like on a piece of wood. Let them dry.
Once dry, fill a container with paint and impregnate the wood on the side where the foam rubber figures are glued, and stamp the figure on paper.
Ask the child to draw the picture he prefers with these stamps.
More information - Stamps with erasers
Source - Martha Stewart