I went to Sterling School for the second time this year to work with two sweet Kindergarten Classes. We had a fun activity that anyone can do with their child: I supplied canvas board and pretty paint colors that the children used as we painted to music.
Since Christmas is around the corner, I played music from the Nutcracker and had students close their eyes and imagine shapes and lines which we in turn painted on our canvas.
I would suggest going one color at a time so that it does not become muddy. Also, I highly suggest breaking out of the Primary Colors box and opting for different hues- mine are more bright and vivid pinks, blues, oranges and yellows.