Leith has been waiting for warmer weather to learn to ride his bike. He has been discouraged in the past by the hills in the neighborhood. Last Saturday, he made a plan with Kevin to get up early and work on it all day, until "sundown"-his words. He got up early, waited for Kevin to finish his run, and then got to work. About 90 seconds later-well before sundown, he was riding as if he had always known how.