A story meant to encourage readers to focus on the positive things in their lives.When Sergio arrives home, droopy eyes and an equally droopy face tell his mood. His day has been "Terrible!" In fact, "It was a completely awful day." It turns out he dropped his lunch tray and his food went everywhere. Mom is not so sure his whole day has been terrible and to prove it suggests an activity involving a scale and a jar full of marbles. As Mom has him rewind the day and remember everything that happened, Sergio places a marble on the "good side" for everything good that happened and one on the other side for everything "bad." By the time they've finished it is clear the "good" side of the scale has outweighed the "bad." Sergio concludes, "It was actually pretty great!" This mindfulness lesson, told in accessible language and using familiar scenarios, does not feel preachy. Mom and the author (in a note that follows the story) both go on to explain "the negativity bias," a double-edged sword our brains use to keep us safe, "but sometimes it can make us think that life isn't as great as it really is." Sergio and his mom are portrayed with brown skin, his father is white, and his school friends are multiracial.Provides readers with an easy-to-replicate method that will help them put bad days and experiences in perspective. (Picture book. 5-10)