I always acknowledge kids that hold the door open for me and tell them thank you and give them a big smile. I say thank you to adults also but I put more emphasis on the “thank you” to the kids. I get upset when people just walk past without saying thank you or even acknowledging someone holding a door open for them, especially if it’s a child. God gave me a big mouth that I’m shocked hasn’t gotten me into big trouble yet, lol. (Knock on 🪵) I always say something to the rude adult who waltzes through a door being held open for them by a child. Sometimes the person turns and looks at me but keeps going and other times they ignore me. It just pisses me off because they act like they are that damn important. I don’t care no one is that damn important, no one!