W.W.
All depends on what your family likes to do:
San Diego Zoo
W. Animal Park
La Jolla Beach
Sea World
LEGO Land
Old Town San Diego (lots of good food)
Griffith Observatory
Coronado Island - this is a GREAT little island - you can walk around and see so much!
USS Midway - this is a GREAT day trip! Walking through the USS Midway
A baseball game - since you'll be there in July!
Point Loma (more beach) and you can see the birds!
Los Angeles
Disneyland
beaches
Hollywood Blvd
knotts berry farm
I hope you have $5K squirreled away for the admissions - if not - look to Groupon and other sites that will give you discounts on admissions. The "free" stuff is the beach - and the San Diego beaches are fantastic