Um...how do you do it?
Okay, okay, beyond stick fingers in paint, then on paper. I know that part!
But, do you put the paint in cups and have paper towels for them to wipe their fingers between colors? Let the colors get mixed? Squirt paint directly onto the paper, or onto a separate paper plate? Have a cup of water for them to rinse their hands? Or do they usually not care about every page turning into a brown mucky puddle?
I honestly can't remember *how* I fingerpainted as a child even though I remember doing it...and my mom is a little bit unavailable for asking (and I think I asked her before anyway and she couldn't remember either)