R P Well-Known Member Oct 17, 2020 #1 Someone has lots of time on their hands... But have to love the ingenuity.
bwilson4web Well-Known Member Subscriber Oct 17, 2020 #2 For 6th grade science fair, I used an erector set and electromagnets to make a 'walking beam.' But I like this one better! Bob Wilson
For 6th grade science fair, I used an erector set and electromagnets to make a 'walking beam.' But I like this one better! Bob Wilson