Go to the local art supply store and get those great big Oak Tag things. At least that's what we used to call them.

They are gigantic big poster size things in all colors.

If you get the white, the little ones can finger pain to their heart's content.

Go to the hardware store and buy a drop cloth (under a buck).

Then put the drop cloth on the floor. Then put the white poster thing and all the finger paints, and the kids can go to town.

When all done, hang up their work of art, throw away the drop cloth, and the house is still clean.

Now aren't I a genius??? lol