What is a game I could Play to help teach the future tense in spanish?

What my Spanish teacher did with our cl to practice conjugation was a "conjugation road race." Basically we were organized into groups, and she would give us a verb, and every person in the group would write one form of the verb then p the paper to the next person to write the next form. To make sure that people weren't doing the same verb form each time groups of five would be best, that way one person does two forms each time, and everyone in the group does a different form each time.