Harrold A.F. Harrold 
Fizzlebert Stump: The Boy Who Did P.E. in his Pants [PDF ebook] 

Perfect for fans of Mr Gum and Roald Dahl, this highly successful and widely praised series featuring a boy, a circus and a lot of silliness is now available in a bright new package.’Freewheeling frivolity’ — Financial Times’Once, and once only, there was a boy whose name was Fizzlebert.’Going to school isn’t very exciting, is it? Well for Fizzlebert Stump it’s a whole new adventure because he lives in a circus. He is usually found training to be a strongman, or being taught history by a magician, or playing football with a sea lion, but not today. After being lost in the woods and mistaken for a very rude girl, here he is, at the back of the class confusing the teacher. Will anyone believe Fizz is telling the truth? Can he find his way back to the circus? Or will he be forced to sit up straight and pay attention forever?