If you have a preschool age child, you probably already know how much they love to paint. Take advantage of the great weather and the free time you have with your child this summer to do some painting. In order to minimize the mess, you can easily do all of these painting activities outside.  Marble Painting  If you have a paint tray, add a different color paint to each slot. If you don't have a paint tray, you can make one using an old egg carton.