The Rugrats are at a craft & antique fair, where Didi is selling her "Bird Homes" -- artistic bird houses that she made. However, she hadn't made any money, or as so much as a glance from someone walking by, due to her competition. Meanwhile, Grandpa sits down on an antique rocker to tell a story to the Rugrats; naturally, he falls asleep. The rocker is up for auction, but with Grandpa still in the rocker, the Rugrats though that it was Grandpa who's up for auction, so they find a way to buy him back. (thetvdb.com)