The Tweenies get excited about singing a song in which they play imaginary instruments.

Jake is scared of spiders, so Max shows him a film and makes him his own spider model. Soon he feels confident enough to join the others in the garden for a spider hunt.

The Tweenies rest from the exertions of their action song and notice how different from them Doodles is. Milo gets in everyone's way with his game, and everyone blames everyone else for playtime chaos.

Jake, Fizz and Max explore an old house which is now a museum. Jake decides he is the Grand Old Duke of York, and insists that the three of them must go up and down any hill that they come across. At the old house, they have great fun exploring the way people lived, worked and enjoyed themselves in olden times.

Jake notices that the curtains of the surprise area are twitching, and he and the other Tweenies decide there is a monster behind them. To their horror Judy pulls a book from behind the curtains, but she doesn't seem to have seen anything scary. When the story about Mr Underbed is finished they admit they are scared of what might be there. Judy encourages them to have a look. When they do they are glad they did.

The Tweenies sing two of their favourite songs - Put Your Finger in the Air, and Tommy Thumb - and it sets them thinking about what they can do with their fingers. They use their hands to make shadow animals while they sing more of their favourite songs. Then they make puppets from gloves and bits and pieces from the messy area, and this leads to a black theatre puppet show narrated by the very able Bella.