Surprises For Boyfriends Birthday! HELP!!!!!!

My Boyfriends birthday is this Monday and i wanted to do something really special.... I wanted to get him a couple of things and then later that day spend some time with him, but i wanted to do something big that dosen`t cost alot, and something he dosen`t know about...example i was going to get something and have it sent to his house because he is off....but my only worry is he is not going to be home.....so can`t....DO ANY OF YOU HAVE ANY GOOD IDEAS IF SO PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!