Actually those are not so hard to make, you just type the actual sentences in a word doc and then just print them out on different coloured sheets (say, if you want your students to work in pairs, so you need to have one sentence typed the number of times on one sheet which equals the number of pairs in your class, one type of sentence on a different colour sheet) cut them into words and shuffle. Also, it �ll be a good idea to provide your students with some envelopes or paper pocket to collect put the word cards in after the activity is done, this way there �ll be less effort on your part using the cards for your next class:)

Sophia