They would no doubt be much more pleased to know that they really aren't related to you.

You want to see their little eyes light up, tell them that.

Rabbit, not much of a movie guy, as all my hobbies spread me 'kinda thin. However, most movies are long on fiction (like portside) and perhaps you will find him able to respond intelligently on that subject-Lord knows he can't on anything else.
Best,
Ted