Leave It to Beaver S06E14 - The Party Spoiler

When an annoyed Beaver finds out that Wally doesn't plan on inviting him to his upcoming party, he takes Gilbert's advice to sabotage it as payback. However, when the day of the party arrives, Wally has a change of heart and invites Beaver to join in on the fun, causing him to panic while trying to find all the gag props he placed around the house.