The action moves upstairs as the transformation of the boys' bedrooms begins. All four of them are keen to take charge of their own room designs and also to get their hands dirty making it happen. They have grand plans, but can they pull them off? On the land, Graham and Sarah decide to install a zipwire across their large pond, and when Charlie and Laurie harvest a load of nettles, Sarah brews up a batch of nettle beer - but not everyone is convinced.