It's class trip time at Einstein Elementary - and that means fund-raising to pay for it. Mr. Flask's sixth graders put their heads together and come up with a great idea: they'll sell solutions to people's problems. They'll even invent things if a problem calls for a new approach. Did someone say inventions? Professor von Offel is all ears...and screwy ideas! He creates a special whizbang box whose energy beam will finally bring him fully back to life. But that's not all the bouncing beam brings back!