This is the norm for us; I always walk ds to his classroom and do an activity with him, he will often show me his artwork or such hanging around the room, I am interested in what ds has been doing. The past few weeks they have been learning about dinosaurs, the weeks before that it was frogs etc. when I'm ready to go ds gives me a kiss and a cuddle and my last words are "I love you".
I note that many parents don't even walk their kids to the door, they drop them off at the gate, and I am in the minority that spend time with their child in the mornings and in particular kiss my child goodbye. I find it sad!
I mean, it's 4yr kindy not primary school!