What's the Big Idea? Ethan Flask and Professor von Offel's Ingenious Inventions (Mad Science)
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Introducing the series that makes science fun! Mad Science. Are you ready? 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!
Best prices to buy, sell, or rent ISBN 9780439235815
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