Well, I'm biased 'cause I live in San Diego.
But I think SD is a GREAT vacation destination for families with kids. I can't speak to Las Vegas because I've only ever been there as a single person. However, all the smoking would bother me, if nothing else, if I took DD there.
Other things to do in SD:
Sea World
Legoland
the beaches
La Jolla Cove
Mission Bay
the harbor
etc.!
But the WAP, Zoo and Balboa Park sound like a great trio of activities!
Have fun no matter which destination you choose!

But I think SD is a GREAT vacation destination for families with kids. I can't speak to Las Vegas because I've only ever been there as a single person. However, all the smoking would bother me, if nothing else, if I took DD there.
Other things to do in SD:
Sea World
Legoland
the beaches
La Jolla Cove
Mission Bay
the harbor
etc.!
But the WAP, Zoo and Balboa Park sound like a great trio of activities!

Have fun no matter which destination you choose!