Gemma Hunt considers how we can all save resources in the home…and she has a story about an ecological detective from outer space!

Ralph van Dijk and side-kick Matrix have more questions to consolidate mental maths skills and the focus today is adding and subtracting the number 9.

Today it's the turn of Geraldine McCaughrean to answer questions about her work and also reveal some of the techniques of being a writer.

For today's programme Richard Lloyd King is off to Oz to create dance sequences based on the extraordinary natural wonders of Australia.