creative ways to pass the time

i used to love jumping rope.  what happened?  i became old enough to go to high school.  this girl has yet to give in to the pressures of life that forced jumping rope out of my life.

ooohhh!  this is more my speed.  a lot of people simply listen to their headphones.  much more brainpower and time is required to undo a gordian knot of frustration.  unlike a rubik's cube, the challenge is vastly different, every single time.  this puzzle managed to keep this person busy the whole time they were riding.