The first book in a magical and mischievous new series for early readers from beloved author Allison Rushby. Imagine if your baby sister could make wishes come true...Flick has just found out her little sister has a special gift. Birdie has wished for a super-fabulous unicorn party and it has magically appeared in their backyard! There's a rainbow slide made out of sour straps (surprisingly slippery), a ball pit full of marshmallows (never sticky), and a real-life unicorn (that poops cupcakes, of course). How can Flick stop the nosy next-door neighbour, Mrs Mortlake, finding out about her sister's magical gift when there's a super-fabulous party going on?