How Do You Ground Kids Now Days?

A few weeks ago Katie got grounded. We grounded her from TV/Movies for the day. She gave us a sad look, but then proceeded to stay in her room listening to books on CD all day. Last night she got grounded again. This time we said "No TV/Movies AND no book of CD". She was unhappy for about 15 minutes. Then she came down from her room playing with her new camera and told Eli she'll show him how to play her Nintendo DS later today.

How do you ground kids now days? There is so much available to them that they can always find something to do. Maybe next time I should tie her up and stick her in the closet when she's grounded. Although, she is playing with her brother a lot today. Maybe this is a good thing after all!