Eftachb, you sound like a wonderful teacher.
Still, I think there might be a problem with what you’re doing.
There has in fact been horrible unmentionable behavior on the part of sick people who exist even in our own circles. To children, and even adults, they look, and seem to act, like everybody else. One way to protect our children from them, is to get the little ones used to the fact that nobody, Absolutely nobody, besides their parents, grandparents, and siblings, has close physical contact with them.
Sad, but true.
In the olden days, before we lost our innocence, a child getting a kiss from a Morah, or sitting on a Rebbe’s lap while reciting Aleph Bais, was perfectly acceptable. I think those days are gone.
There are, however, plenty of other ways to show your students that you love them. Children are sensitive creatures, and will pick up your warm feelings from a gesture or the tone of your voice, even in the absence of physical touch. Some of my children were lucky to have Rabbayim
and teachers who clearly demonstrated their love for their students without any physical interaction. And it’s still remembered years later.