Besides using their fingers or a paint brush, give kids another method of painting. Put a little bit of paint on a plate and use items with different shapes to make a masterpiece. In this picture, my daughter used a toilet paper tube and a plastic fruit cup to make the shapes on the paper. We also made another paper with triangle shapes. We used different sizes of cut cardstock paper folded in three and taped together to make triangles. See what other shapes you can find around your house to use. I'm sure you can find squares, rectangles, etc.
A fun way to use paint without the mess is putting the paint in a Ziploc bag. Make sure the Ziploc bag is securely closed all the way and to not use too much paint.
Kids will love this fun painting activity using forks rather than a brush to create a variety of of cute bear paintings. This is a page about how to paint fork bears.