Matthew Sparkes writes "Tom Van Baak and his three young children performed an impressive experiment on the theory of relativity. The group took a van equipped with 3 atomic clocks up Mount Rainier, near Seattle, for a couple of days camping. Because of the altitude, and therefore speed difference, they could calculate that there would be a time dilation of +22 nanoseconds between the two vans clocks, and some left at their house. If everyone's dad was like this then the world would be filled with theoretical physicists."
"The trouble with doing something right the first time is that nobody
appreciates how difficult it was."
-- Walt West