Leapfrog is a series of first reading books for new readers and older reluctant readers. The stories are presented in large text format and are accompanied by bright, full-colour illustrations. Bill's Baggy Trousers - Bill's mum buys him some new fashionable, baggy trousers with which he is very pleased. One windy day, Bill's mum sends him to the shops and all sorts of strange things start to happen to his trousers!