This craft requires you to invest in some water-based paint, if you do not already have it lying around. Alternatively, you could pull some condiments out of the fridge and make this project into an edible art piece. Your other supplies will include a box, a marble or other spherical shaped object, and a piece of paper for each child. Put the paint into easily accessible containers such as wide jar lids. This allows you to limit the paint your kids have access to and still cover the marble easily. Let you child choose their color and drop the marble in the box, onto the sheet of paper. Your children can tilt and roll the marble around the box until it runs out of paint or they’re ready for a new color. At the end of the day, they’ll have their own Jackson Pollack style artwork to display.