Do you have a toddler that does this when fingerpainting?
If your answer is yes then here is a edible finger paint recipe for you.
All you need is sweetened condensed milk and food coloring. We did two colors so I put a little bit of sweetened condensed milk in each bowl and then put food coloring until I reached the color I was trying to achieve. Easy enough, right?
I wouldn't advise letting your child eat the whole bowl because it is way sweet but if they have a couple licks in between painting it won't hurt ;)
When dried, this paint gives a very glossy finish. After letting these air dry for 8 hours and they still were wet, I put them in the oven on the lowest setting for about 10 minutes and that did the trick.