Fun Medicine ball exercises

[Fiddleman 4,376]

My wife and I bought some medicine balls of 6, 8 and 12 over the weekend as an alternative exercise we can do together. Short of just playing catch, what are some good exercises that you have done with the medicine ball involving 2 people? These 2 person exercises do not need to be challenging, but more on the fun side. I will do the challenging exercises individually with the 12 lb ball, but would not mind some suggestions there also.