The children depart from Warner's Holiday Village at Dovercourt on a trip by coach to the Aquarium at Clacton Pier, singing all the way. They visit the aquarium and the penguins, but the main feature they see is the dolphin show. The dolphins jump through hoops and over poles, throw balls from the water and perform a routine wearing spectacles. A sea lion 'applauds'. The three dolphins are Maria from Malta, and Bubbly and Squeak from America.