Arthur's wrong guess about the identity of the secret admirer sending him valentine messages leads to teasing by the other children, but clues in additional messages allow him to get his due.
Arthur is unhappy about going on vacation with his family, but he shows them how to make the best of a bad situation when they end up stuck in a motel because of rain.
D.W. bosses her brother Arthur into carrying her on his shoulders at the beach because she maintains that she hates the water, until she gets a big wet surprise.
After Fern and Sue Ellen take a popularity test in a magazine for teenage girls, the two start changing, leaving their friends longing for the old Fern and Sue Ellen to return.