Your two year old won't remember this party, so don't go too overboard. If your two year old is anything like my child was at that age, then he probably enjoys popping bubbles and throwing things. Games like tic-tac-throw or sticky darts will keep him entertained even if he can't understand the rules and giving out small bottles of bubbles to all the guests will keep bubbles wafting through the air. Other than that, if there are going to be many other children there, a loud and obnoxious kids movie playing in one room is always a plus, anything made by Pixar should do. That said, you can't ever have to much candy and cake when dealing with kids.