If you are looking for something fun to do, check out the color test that x-rite is offering on their website. Can you arrange the colors by hue? Add some challenge by seeing how long it took you. I won't lie to you...it took me longer than I thought it would, but it didn't occur to me to time myself. A lower score is better...zero is perfect and I think the worst score you can get is something around 2000 (100 hues and all the infinite possible wrong wrong combinations of them). I got 14--you can see the color hues I missed, they are the little white bars. It doesn't surprise me a bit that I'm pretty good with those purples! :-)
Go here to try it yourself: http://www.xrite.com/custom_page.aspx?pageid=77&lang=en
Go here to try it yourself: http://www.xrite.com/custom_page.aspx?pageid=77&lang=en