my boyfriends mom and i are planning a suprize party for my boyfriend but we have no idea what to do for the party. girls are easy but what should we do for a guy? any suggestions?

As long as you know who he would like at his party it will be fine. Set up a volleyball net and stuff, but guys want to just hang around with there friends. Maybe random contests would be fun like "who can stuff the most marshmellows in their mouths at once" guys love that sort of thing..hope it turns out good!