Second set of 21 cards (42 in total)ss play in groups or pairs, one player takes a card and the other has to guess which is the puzzle presented on the card, every time the answer is correct one point goes to the player. You can set a time for playing the game and the ss who has got more points it´s the winner. Another option will be to take it in turns and give, for example 5 minutes to each ss, to see how many cards can guess in the given time. If you think of other possibilies, as playing with a boardgame can also be possible. It´s a good way of making a general revision vocabulary. the back of the cards is also included. Hope are useful for you :) - ESL worksheets