The day I swapped my dad for two goldfish

About “The day I swapped my dad for two goldfish”

A boy trades his father for his friend's two goldfish. When his mother returns, she sends him and his younger sister to return the goldfish and recover their father, but his father has already been swapped again. This continues throughout the neighborhood before the boy finally returns his father and promises never to swap him again, though he eyes his sister as possible future collateral.