Summer Love (a.k.a. Beach Story).When Arnold, the boarders and the Patakis go to the beach, a girl uses Arnold to win a sandcastle competition. Ernie gets buried in the sand. Miriam and Suzie start taking dancing lessons from a handsome dance instructor named Carlos. Grandpa Phil thinks he is stuck on an island. Oskar starts using a metal detector to find "treasure". Big Bob gets a bad sunburn. Helga tries to warn Arnold that he is just being used.