The tree dwelling Twimbolians are in a frenzy to become brown, while Dr Flay's sun-shunning shoes, and crazy creams are making the beach loving Twombolians lily white. Will the citizens of the twin towns work out what greedy Sansoufflé is up to before it is too late? 'Twimble and Twomble' is the fourth book in a series that transforms learning about health into high adventure. This funny rhyming tale introduces the importance of sunlight in a kid friendly saga.