Because I like what I teach.
I get overly excited and make a fool of myself.
And I have this strange belief that everyone really has a natural interest in the way the world works. It just has to be brought out. So I like doing demonstrations and labs and asking lots of what if questions.

If the teacher asks a what if I now do this, after doing a demonstration, (changes the demo a bit) and the kids can predict what should happen, and indeed it does happen, one knows their model of the way the world works is decent. So I do another what if. And it gets quite fun when the what ifs involve experiments that are counterintuitive. Then they see what you see (only better sometimes which is most exciting) and everyone gets very happy.

So I have fun. I like my job.

The only way I feel like I a molding anybody, is just bringing out the natural curiosity that already exists. I dont try and mold. I just like kids to ask questions about why things are the way they are. Not just simply look at some physical event, and not ask why.