For this activity I made some homemade paint from a recipe I'm not going to link because it wasn't that good. I think I'm going to go with boughten paint in future, toxic or no, because I'm not prepared to sacrifice all my food colouring in an effort to get true red so we can do a proper colour mixing exercise. What we did:
-Watched this video on the colour wheel. I was pleased to find this, so simple and slow.
-Mixed up some flour/cornstarch paint and explained how he could mix different colours to make new ones.
-Let him at it! You will see from left to right that he made some beautiful muddy colours with my original neons. He also experimented with dripping paint all over the place and making letters (his U is in the right-hand picture). And painted a dirtbike and a trail for it. A good day's work.