Max takes a trip to the launderette and decides to have a stroll around the town.

As the Tweenies sing and play, Doodles tries to tell them that he has found something. Each time the Tweenies go to look they see nothing. However Fizz believes Doodles and eventually the two of them discover the mouse which has found its way into the playroom. Judy explains that they must put the mouse in the nearby field.

Fizz wants to be a princess who wears a beautiful dress and goes to a ball. The boys are more interested in hunting for bugs and insects. Fizz does not like creepy crawlies but Bella persuades her to look for butterflies because they are pretty and gentle. They find a beetle, a worm, a ladybird and a caterpillar, but no butterflies. Fizz is upset but Judy gets them all to perform a song which makes everyone happy – The Ugly Bug Ball.