Found on Haddock.org. A video clip of a Emily stacking plastic cups. Take a look. The caption says it's actual speed, which is amazing as it's difficult sometimes to see her hands move. This is apparently a "sport" or physical education activity. There's lots of stuff on the site about the benefits participation brings. I'm not so sure about that but it looks like it might be fun to try. We've got lots of left over plastic cups in the cupboards at work, maybe I'll have a copyright infringing try with those tomorrow.