https://almostunschoolers.blogspot.com/2010/05/tumblewing-surfing-scientific-boredom.html
Almost Unschoolers: Tumblewing Surfing, A Scientific Boredom Buster
The strange pile of junk, I have pictured here - a phone book, a scrap piece of cardboard, and a printout from The Science Toymaker , repres...
almostsurfingscientificboredombuster