Colorado Parks & Wildlife Research Library

"From lightbulbs and bottle caps to water taps and peanut butter lids, screws are everywhere! Learn about screws and make your own spinning top with the help of an alien engineer"--

"Inquisitive makers will love learning about pulleys and how they work thanks to the Maker, a wacky alien with a passion for simple machines! A hands-on back matter activity adds to the fun"--

"A smart but silly alien companion and toy-making activity make learning about levers tons of fun! Readers can discover how levers work and the types of levers we see in our everyday lives"--