Some of the Mr Men and Little Miss have a few things to learn about being environmentally friendly. Mr Perfect likes his lawn to look absolutely perfect, so he waters it morning, noon and night. Mr Lazy is too lazy to bother turning his lights off and Mr Skinny regularly buys more food than he can eat, so he throws most of it away. Maybe they could learn a thing or two from Mr Mean who doesn't like to waste anything or spend more than he needs to? Little Miss inventor has some brilliant ideas to help them out!