She's got my number

Princess #3 has recently decided that SCREAMING is a good and valid form of communication. Since she used to calmly speak in complete sentences, I'm obviously not a fan of her newfound avenue of expression. To discourage her from allowing high-pitched shrieks to permanently replace words, we've started putting her in time out each time she screams inappropriately. At this point, time out occurs in a little pink plastic chair adorned with black marker (don't ask) that faces a blank corner in Princess #3's room.

Yesterday, Princess #3 had already been to her pink plastic purgatory 2 or 3 times when I caught her once again screaming - this time at Princess #2 who apparently made the unfortunate mistake of crossing her. I immediately reprimanded Princess #3 and told her she needed to go calm down in time out.

Expecting more screams and additional drama, I was taken aback when Princess #3 immediately stopped screaming. She cheerfully sang "OK!" and skipped off to her bedroom, arranged her tiny self on the little pink chair and stared dutifully at the corner. Now what am I supposed to do with this girl!? I *thought* time outs were supposed to be miserable and not fun. It's kinda hard to punish a kid when they actually *like* the punishment. I'm pretty much in for it, aren't I?