Fill several knee high stockings with sand pushing each one down to the bottom to make a round ball the size of a softball. Get a box large enough to hold the paper on which you want the children to paint. (It helps keep the splatters inside). Put the paper in the box, dip the filled stocking into a tray of paint and drop it from a distance down onto the paper....BOOM!
We let the children stand on chairs or when outside, the picnic table to give more height to the BOOM!.
Give it a try, its so much fun!!