There is a Science Fair at school and Lottie decides to research if it is possible to build a robot using only recycled materials. It is hard work, yet fun and exciting too. Maybe if the robot is really good it can even help her to tidy her bedroom and do the household chores! It is lucky that Lottie’s bedroom is so messy as she discovers a heap of useful things she can reuse and recycle to build her ‘Busy Lizzie’ robot; even some old shoes. Will Lottie’s Science Fair project win a prize?