Name one feeling out loud, about yourself
At some point today, say what you are feeling and why, in one plain sentence. Nothing more is needed. A child who hears it done learns that it can be done.
Wait for something together
Choose something small you both want, and put it off until tomorrow on purpose. Talk about the waiting while it is happening rather than afterwards.
Notice who was left out
On the way home, ask who played with whom today. Not as an inquiry — as a habit of noticing. It becomes their habit surprisingly fast.