On an ordinary morning, in an ordinary flat, an up-till-now perfectly ordinary Bertha does an extraordinary burp. A burp so extraordinary, it knocks things over. A burp so humongously big that very soon it's causing havoc in the school canteen, the playground, not to mention her grandad's apple trees...
Michael Rosen is one of Britain's foremost children's poets and writers. He regularly performs his poetry in schools, and can be heard on BBC Radio 4 as a regular presenter. He also teaches at the University of North London, and has published over 100 books for children.
