I did not sign up my kids for any formal art lessons. Maybe I don't want to burden my daughter with too many classes since she is already taking up piano and ballet. There's plenty of resources from the internet and I found this Colourwheel Clown Art Project to introduce the colour wheel to my kids.
First, you find a white card paper. I use a paper plate actually and cut it into a circle and then I drew the lines myself.
Then I asked them to paint the primary colours first. Red, yellow and blue on every alternate pizza slices leaving the other slices empty first.
Next, I get them to mix the colours on a palette. Red + yellow = orange. So we paint the pizza slice in between the red and yellow, orange. Blue + yellow = green. Blue + red = purple. Same goes to the other slices.
I then get them to paste the colour wheel on a art paper. Right in the middle. The colour wheel will be the body. Then the kids will have to paint out the face, hands and legs according to their imagination.
Joseph's masterpiece. That naughty boy just wouldn't leave the clown alone. He enjoyed making it messy.
So that's one project you can do with your kids. Teaching art and some bonding time as well. You can introduce patterns as well like polka dots or stripes to the clown's socks if you like.