Next chance you get - attend a conference. A week of fun and education you will never forget. For a different look in clown noses, why not try a foam cat toy ball. There are a lot of noses out there disguised as toy's - just look around. Painting Use background music as you face paint.
Calliope music is good, but sing-alongs are better.
Jokes are a great way to entertain as you face paint. Learn a few. Share them with the kids. Ask who would like to be a kitty - most of the kids probably do not want to have kitties but they do want to be first. Pick 4 or 5 kids and do them assembly line style - all at the same time.