Mini air hockey game compete with paddle and pucks, features automatic puck return! 3xAA batteries required which are not included. If hockey doesn't take your fancy then how about a desktop mini football table? This is also £5, complete with footballs, detailed players and individual score boards, also features automatic ball return. Plus 2 white and 2 black balls.
Link to football table is here, http://www.johnlewis.com/john-lewis-desktop-mini-football-table/p231675941?navAction=jump