Hello,
Here is a great game for drilling large classes - this one is for speaking practise once the words have been introduced and their meanings learned.
You can see the game fully explained with language ideas for using it on:
http://www.teachingenglishgames.com/games/relayrace.htm
Relay Race - although you can call it whatever you like - is dead easy to explain and use and you only need picture flashcards to play.
Kind regards
Shelley