Finley can't wait to start the inventors project at school after all, thinking up new ideas is her thing. But when the prototype of her Supersonic Sibling Sublimator fails and her older brother plays a joke on her, Finley discovers that everyone could stand to lighten up a bit. Starting over, she creates a hilarious device guaranteed to make people laugh more and live longer. But will her entertaining invention work on the super-serious invention judges?