Yes, it is very exciting to see your boy make a bubblenest for the first time, I know I was In fact I still get excited when I see them building one, or having built one during the night.
My newest guy just made his first bubblenest. It's just a ring of bubbles all around the tank, just one bubble, not a group like normal, it's pretty cool looking. His neighbor has never made a bubblenest before but he did yesterday, I think he's trying to show the new guy how it's done.