I would suggest contacting your local police department and ask that they alert local pawn shops. If you registered the laptops, call the manufacturer (HP, Toshiba, Lenovo, etc.) and let them know that the computers were stolen and need to be flagged as such. I know when I used to work for DELL we had the ability to tag them.
I appreciate your feedback and suggestions. I called the police the very night we realized we were robbed. As far as asking them to alert pawn shops, I figured they did that automatically, or they should. We didn't have the serial #'s either. I figured it's too late and they'll probably not be found. I had extended warranty on my daughters computer however, it didn't cover theft. Unfortunately, we did not have renters insurance at the present time.