Kathryn the gym fairy

"Best friends Kirsty Tate and Rachel Walker usually only get to spend vacations and holidays with each other. But for a special week, they'll both be going to the same school! They soon discover that Jack Frost is causing trouble at the Fairyland School--the School Day Fairies need their help! Kathryn's magic gym badge is the only one still missing. Rachel and Kirsty have to find it so that school days are fun for everyone again!"--Back cover.