Book excerpt: These fun-filled chapter books mix school, monsters, and common kid problems with hilarious results. You'll scream with laughter! Mean Mrs. Green says that everyone has to invent something for the school science fair. But everyone would rather invent a way to get out of it! Hubie can't decide on what to invent and all of his friends have already started their projects! It comes down to a choice between cloning himself or building a laugh machine. Will his innovation be enough to earn a passing grade, or will mean Mrs. Green have the last laugh?