It's A Small World (Pilot Episode) - S0.E1

Wally and Beaver want a new bicycle. Frankie Bennett, a mischievous boy, tells them new bikes can be had a local dairy in exchange for 1,000 bottle caps from the company's products. The boys collect the bottle caps, but, in attempting to redeem them, learn they've been duped. Ward takes pity on the boys and buys them a bicycle.