One of the easiest paint designs your kids can do: Bottle Paint! Whether it's creating a single flower, or a vase of them or even a cherry blossom tree! This craft involves a few old bottles, paper, paint and you can let your kids run wild with it!
picture shapes - what an amazing idea, i would have never thought of that! [actually this is not "picture shapes" it's how to make shaped bokeh but still a good technique of attaching the paper to the lens]