In the classroom, we give the children their own canvas for their birthday to create a classroom painitng. These are displayed in the classroom until the end of the year and are a classroom collaboration. One way to control the painting without controlling it is to designate tools for specific colors. The birthday kiddo picks the paleete and does the basework. The next kiddo picks a color and a tool and adds to it, and so on. Once a tool is used, we remove it from the mix. We've usd paintbrushes of all sizes, rollers, tubes, bowls, q-tips, sponges, spray bottles and more. The end results are really fun and colorful without being muddy. Now, mind you, outside of the birthday canvas, the children have access to all the colors and materials they wish to use so there are plenty of painting opportunies that are truly process oriented. I have had children grab an ENORMOUS sheet of paper only to add three tiny brushstrokes in one corner, others will begin by painting an awesome picture of stripes and dots only to paint all over it with all the colors until it's a big brown mess. It's cool, it's their art and they love it. I love it too!