5 designs guaranteed to win 1st place or your money back. I hope you enjoy the video and learn something new like I did when I made it. Feel free to share with any one who likes to learn science or is in a High School Physics class! | Mark Rober
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5 designs guaranteed to win 1st place or your money back. I hope you enjoy the video and learn something new like I did when I made it. Feel free to share with any one who likes to learn science or is in a High School Physics class! | Mark Rober
7M viewsNov 30, 2020
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