Grab a thirty circle template.
Grab a pencil, pen, crayon, marker, real or digital and the 30 circles template. Fill as many of the 30 circles as you can. The goal is quantity, not quality. Patterns, doodles, shapes, animals, plants, words, and objects are all fair game, as are drawings that incorporate more than one circle.
Adapted from a group activity developed by Bob McKim and made popular by this TED talk