It's a sunny day in Biggleton and Fire Fighter Lois, Professor Millie and Yusuf the Greengrocer go for a picnic together. Yusuf asks a robot to look after his shop whilst he's away, but things don't go to plan. The picnickers race back to the greengrocer's to see what's wrong with the robot and soon notice that his battery is empty. Professor Millie comes up with a clever plan to help recharge the robot - a solar-powered hat! Show less