Hmmm, I don't know about indoor ative stuff unless there is a rock wall climbing place or gym or something near you that has activities. Otherwise, what about planning a fun day at home with a fun meal and a dance party or something. Or, if you have a Wii, perhaps a Wii games tournament? Otherwise, I'd just try to do something fun, and save the active stuff for another day. You could always walk around the mall, the the kids play at the playplace (if there is one) and browse the shops. Happy Anniversary! We're celebrating 5 years this year, too!