Leave It to Beaver (1957)

S4E4 Wally, the Lifeguard

Beaver excitedly brings his friends Whitey and Gilbert to the lake for a picnic, eager to watch Wally on his first day as a lifeguard. However, Beaver is unaware that a recent law has prevented anyone under 18 from being a lifeguard, so Wally is stuck selling snacks instead. When Beaver spots Wally in a silly hat selling hot dogs instead of proudly guarding the beach in his lifeguard outfit, he feels embarrassed and wishes to leave before anyone else discovers the truth.