Penelope K, by the way - Clouds

Penelope K runs the Information Station, a place which contains all the answers to any question a child might have. To help her find the answers, Penelope is joined by her sock puppet, Squirm; Hank and Frank, two wise cracking fish; Trewey, the shadow rabbit, and music is provided by the Rubber Band. What are clouds made of? This curious question has Penelope K learning about evaporation, water vapour and condensation. But only when she boils the kettle for a cup of tea and sees the steam coming out does she realise that clouds are made of water vapour, and no, it wouldn't be a good idea to sit on one. You'd fall right through!