As a student and teacher myself, I think the parent-child relationship was explained excellently well. In fact, this is the best analogy I've seen in all my years! Congrats for being such a good instructor :)
I will third this! I was so amused that I rushed to make this exact comment only to see it had already been made...
TWICE...
doo doo doo doo doo
I'm sure - whenever I will parent two objects in future I will remember your explanation and your special soundeffects in particular. Love it :-)