i really think i have discovered it
okay, get a u-shaped tube
get 2 nickel plated magnets (which i have n r extremely powerful) represented by 2
get 7 metal magnetic balls represented by 3
1 1
1 1
1 1
1 1
\________/
3233 3233
tape the magnets 2 the tube, n get hinged covers for 1 side n close the other up
drop the first metal ball
it will snap into the others, causing the magnet on the other side to move, hitting the other set and causing the very right ball to go up the tube
it will come back down n repeat the process, going the other way.
so what do u think?

