Three-year olds in Greenbelt and previous homes taught me how to be a friend. 1. Delight in differences: "Hey Mom, Rhonda's blue, and I'm red!" Brother and sister--friends for life. 2. Declare your devotion: "You're my best friend, grama." "I love you, Judah." 3. Go on walks together: "Look, a butterfly!" Kindred spirits bond outdoors.