A Standing Version of the Seesaw...
(Photo: Winfield Parks/National Geographic)This photo from 1964 shows an unusual and awesome seesaw in Tokyo. One child pulls down and the other flies into the air.Okay, I understand why most kids were never allowed to p...
https://www.neatorama.com/2013/09/20/A-Standing-Version-of-the-Seesaw/
