I used basic primer from Lowes as a base.
I went to Hobby Lobby during the week and loaded up on different colors of acrylic paint and different size paint brushes for the kids to use. I also had some left over paint from the previous owners of the house, that they left. At Hobby Lobby I also go different stencils for them to use if they wanted to. When they finished I sprayed them with a waterproof sealer to protect the paint from mother nature.
Don't they look great!