Bethany's hamster, Hammy, is a genius - and he loves to learn new things. So when Bethany's little brother brings back a big brass trombone from school, Hammy can't wait to have a go! But little hamsters should be careful about making too much noise - especially ones as special as Hammy. You never know who might be listening... Another fantastic story about Bethany and Hammy, from best-selling author Poppy Harris.