Listening - Even though this says "listening game for adults", I think it would be great for the elementary classroom as well. It gives students the opportunity to strengthen listening skills as well as cooperation skills, plus it would be fun!
There is a very big difference between being bossy and assertive. Being assertive is a very big part of healthy communication and healthy communication is necessarily for building strong relationships and keeping stress at bay. Life is stressful enough with things we cannot control so it is wise to learn to manage well those that we can. Communication is one of them.
I want to have an open relationships with my students and I want them to feel safe discussing any topics, including the more difficult ones like race, culture, religion, etc. I think this saying hanging in the class will foster that idea and is a good way to show your students you are a person always willing to learn and be there for them. This is part of creating a prosocial environment, as our text described in Chapter 4.