In the Toy House kitchen, Mr Onion and Pepi Nana find the little toy tub. Little Nana wishes that the little toy tub was a great big tub. In Storyland, everybody enjoys a Rub-a-dub-dub song with the great big tub.

The discovery of a nursery rhyme book in the Toy House inspires Mr Onion to play at being Humpty Dumpty. When Humpty Onion refuses to fall off the wall, all the Toy House friends join in a game to make a comical new ending to the Humpty rhyme.

Pepi Nana is big and Little Nana is small. When the two friends go for a walk together, they discover how they see things differently - and how much fun that can be.