Bitesize Daily: 5-7 Year OldsWeek 9Science plus Sound as vibrationsBBC Bitesize Duration: 20 minutesFirst broadcast: Wed 27th Jan 2021, 09:00 on CBBC ChannelLatest broadcast: Wed 27th Jan 2021, 09:00 on CBBC HDSound as vibrations, writing letters and more from Karim and George’s Marvellous Medicine.GenresLearningPrimaryBrandBitesize Daily: 5-7 Year OldsSeriesBitesize Daily: 5-7 Year Olds: Week 9 Source: BBC Online