"she spit in my hair!!"
i look at the offending child. she grins nervously. "it was an accident!" she yells, but her face betrays her. i walk over, gently take her head in my hands, and pretend to spit right into her hair. the spit-on child laughs hysterically; even the offending child does. i say, "i didn't really do it, but next time you spit on her, i will. and my spit is bigger. and stickier!!" we all laugh. the offending child says, "but you can spread germs that way!" i respond, "yes, you can, so don't do it to your sister." "we have the same germs," she protests, "we're twins!"