Just before Beaver is to go for a weekend visit with Aunt Martha, he and Larry spend the afternoon at Uncle Artie's magic store. With magic on their minds, they decide to play a trick on unsuspecting five year old Bengie Bellamy: Larry pretends to turn Beaver into a rock, with Beaver really hiding in a box. But before Larry can "change" the rock back to Beaver, Larry has to head home, with neither Beaver or Larry thinking anything of Bengie still believing Beaver is that rock. Mrs. Bellamy is at her wits end trying to convince a scared Bengie that the rock he is caring for is not Beaver. Bengie needs to see Beaver in real life to be convinced, which can't be done now since Beaver is at Aunt Martha's. Even Wally, thinking more like a kid than the adults, does what he thinks will convince Bengie, but to no avail. Will they have to wait until Beaver's return for Bengie to be convinced?
—Huggo