Looking for something creative

I coach at a small school and we normally have 15 seniors on our roster. Five never come off of the field and six never touch the field. Every year I try to put in a special package, about three or four plays, that all of the players that normally do not play can go in and do together. I would take the kids that never come off the field out for this special series. I will keep someone in if no one else can do what we need to do. Our senior class is linemen heavy, three very good and two that have never played before and have trouble getting out of their stance. In the past we have done the single wing, a triple pass, lots of wierd formations.

My question is if anyone has any ideas for something new? Any special plays or formations that can freak a team out?