"The 20 easy-to-build robots in this project book can be constructed for little or not cost using common household objects and repurposed materials."--
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Bobby Mercer has been a high school physics teacher for more than 20 years. He is the author of Junk Drawer Physics, The Flying Machine Book, and The Racecar Book. He lives outside of Asheville, North Carolina.
???zh_TW.webpac.authordescSource???:三民網路書店