On Mood Monday at school, Theo has a hard time deciding what he's feeling after sharing the news that his mom had a baby. Each of his classmates suggests a possibility based on the feelings they have to share about recent experiences. Eric is happy because he got a new bike. Lily is jealous because her sister won another trophy. Ameen describes feeling afraid when he got lost in the mall. And so on. Theo thinks about it, and realizes he is feeling all of the same feelings as the other kids, but for different reasons: happy, for example, that his grandma will be staying for a week; afraid of dropping the baby. He's also jealous, sad, proud, and mad. In other words, "I feel like a big brother!" The fact that feelings are not always immediately clear is treated with engaging simplicity in this appealing story. (Ages 3-6)