These magic verb cards (available in German Spanish and French to my knowledge) are available from www.advancematerials.co.uk and cost less than £7 including VAT for a full set and a couple of "magic" cards. As you can see from the photo, pupils get the card and can see the whole phrase including the correct part of the verb. When they have had some time to study the card, they are asked to cover it with the "magic" red card which hides the orange text ie. the verb. Awesome! We had great fun and the pupils are all much better with verbs - result!