Flexible thinking, winning, losing, sportsmanship, and playing fair are a few of the topics Zeebu and his friends encounter in Play Power. Childrenâ€™s activity pages teach social rules for game play as part of a group. Red and green thoughts are also introduced. Red and green icons are placed inside of thought bubbles throughout the activity book, in order to help children understand the impact of their behavior on their peers â€“ both positive and negative. 5-book set.