First - I have a long, uphill, slightly curved driveway. Second - I have a 50 gallon rolling trash can. (I never fill it, but the price was right)
This AM, being trash day, DD found a new "thrill". Roller blades and helmet on, she'd hold the handle of the trash can and roll down hill and see just how far she'd coast toward the cul-de-sac. Pull the can back up hill and do it again. I stopped worrying when I saw how much control she had and just laughed.
C