As seen on Martha's site
In summer, the mere mention of chores can evoke reactions usually reserved for dentist appointments and haircuts. To make tasks less tedious for everyone, print them on strips of paper, color-coding to distinguish "grown-up jobs" from "kid jobs." On chore day, have everyone draw and complete a job.
Doing this TODAY!!!
I'm sure there are tons of variations instead of a Jar. My creativity level is low today, a jar will do.