The Hundred Dresses by Eleanor Estes is a sweet children's book that I've recently re-read as part of a church group reading project.
I was reminded again of the importance of being kind to others and the need to be proactively do good and not just avoid doing bad. Sometimes not doing or saying anything can mean that by default you support the negativity that is taking place. It's also a good refresher on not judging others nor being hypocritical.
I was also reminded of the need to be kind to those who may not be kind to you. It reminds me of what Matthew 5:44 says. "But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you and persecute you."
It's a little book with a big message, and I encourage you to read it and remember some basics of being kind that we tend to forget as we get older.