‘I want the old Mr Brainfright back,’ said Jenny. ‘He’s not a very nice banana. I liked him better when he was a human being.’

When Mr Brainfright dresses up in a banana costume to take on the role of school mascot, it looks like Northwest Southeast Central School might beat the bad sports of Northwest West West Academy for the first time ever. But then Mr Brainfright begins to think he really is a banana…