Contributor Bio:Higgins, Nadia
Nadia Higgins is the published author of more than 70 books for kids and young adults. In addition to weird inventions, she has written about explorers, national parks, outer space, pop stars, and zombies. Higgins lives in Minneapolis, Minnesota with her husband and two daughters.

Contributor Bio:Nardo, Don
Noted historian and award-winning author Don Nardo has written many books for young people about American history. Nardo lives with his wife, Christine, in Massachusetts.