Splash Pad Sabotage - Franklin W Dixon - Bog

Frank and Joe are looking for ways to beat the heat on their summer vacation, so they're super excited about the opening of Bayport's new Splash and Dash Pad. But on their second visit, they find that the fountains are overrun with bubbles! The park director announces that the pad will stay closed until he finds the culprit who poured soap down the drains, so the boys pull out their clue book to search for the Bayport Bubbler.