About the Author

Tammy Enz became a civil engineer because of her awe of the massive steel bridges that spanned the Mississippi River. She just had to figure out how they worked. Today, she still likes tinkering and figuring out how things work. When she isn't tinkering, she fixes up old houses and conducts experiments in her garden and kitchen. Most of all, she loves reading books about anything and everything and asking 'why?' Jodi Wheeler-Toppen is the author of more than 10 books for children and teachers. She holds a PhD in science education from the University of Georgia. She lives in Atlanta, Georgia, with her family. When she's not doing science with children or teachers, she's trying to build a whatcha-ma-jigaroo out of spare parts. It will surely be a remarkable device (if she can ever get it to work)!