Before we left for Costa Rica, we were playing Uno and Yahtzee pretty often at home. Sometimes M was really happy and complimentary when he lost and other times he was a REALLY sore loser. Unfortunately, losing happened more frequently, and he seemed to get really worked up about winning and would often change or attempt to change the rules to aid his cause. I sometimes lost on purpose and did my best to model good behavior. Games can be fun, they can exercise the …