8. I Am Inventing a Usefullish Invention

Charlie and Marv have to come up with an invention for a school project by tomorrow. Lola reckons that she's an extremely good inventor too, and keeps interrupting their efforts with ideas of her own. The boys have got to invent something really fantastic and time is running out. Just as they are beginning to panic, Lola the Inventor stumbles on a brilliant idea!