tag:blogger.com,1999:blog-20039256.post3183348582744495624..comments2023-12-16T07:28:27.968-05:00Comments on Notes from the Technology Underground: Backyard Ballistics NEW EDITION now availableWilliam Gurstellehttp://www.blogger.com/profile/12504155694151207039noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-20039256.post-5176478186698020872012-10-22T14:57:08.372-04:002012-10-22T14:57:08.372-04:00We enjoyed your talks this weekend at Celebration ...We enjoyed your talks this weekend at Celebration of Mind. <br /><br />My 7 year old even grasped what you were talking about with The Art of the Catapult. <br /><br />He took notes:<br /><br />http://theapels.blogspot.com/2012/10/the-at-of-catapult.htmlAn Apel a Dayhttps://www.blogger.com/profile/05409392467947270395noreply@blogger.com