Quiet Time

My kids are getting board with quiet time, and don't want to do it. Guy will tear apart his room, bang on his door, etc. Cinderella comes out constantly, wanting to know if it is time to be done.

So I know I've asked a question similar to this before, but I'm going to ask it again. Maybe there are some new ideas out there.

Do you do quiet time at your house? What kinds of things do you have your kids do during quiet time? Do you have any ideas of what I can do to make quiet time be a fun and exciting time, but still a break for me? Any ideas of things they can do on there own, in their rooms that is quiet, and nondestructive?

I would appreciate any suggestions any of you may have.