I was just notified that we will not be having a program that was supposed to last an hour and a half tomorrow afternoon. Being the last week of school before Christmas break, I don't want to start anything new. The children are anxious to be out of school and very active. I have a busy classroom and students with an attention span of about 20 minutes. Any suggestions for a lengthy activity, project, or other that is inexpensive, needs little materials, and is interesting. All ideas are welcome. I'm desperate. HELP!