I sing "Pop goes the weasel" or a variation thereof to ensure that my son spends enough time brushing his teeth.
Sometimes I make up sillier versions, like "All around the cretaceous period, the T-Rex chased the triceratops. The T-Rex thought it was all in fun, until RAAWWWWR goes the triceratops. A penny for a smilodont, a penny for a mammoth, that's the way evolution goes, until POP! They're all extinct."
Yes, I have a miniature paleontologist in the house, and no, I don't get out very much
Rose