S02E16: The Boat Builders

Wally, Chester and Tooey are building their own boat and plan to sail on it, despite Ward and June's forbidding Wally. Once at the lake, Beaver is the only one small enough to get in it and once on the water, the boat tips over, leaving a soaked Beaver behind. However, it's trying to keep their afternoon of boating a secret from Ward and June that's really going to wipe Wally and Beaver out.