I went with my 3 girls to San Diego and fell in love. It is beautiful out there. Everywhere you go you can see the ocean. We had such a great time. We dedicated each day to a different activity. One day we did Seaworld. (My girls loved it when they were younger and still love it as teenagers) One day we did Wild Animal Park (amazing ! the animals run free, you feel like you're in Africa)The next day we hung out at Old Town (it feels like you're in Mexico.) There is an awesome carnival style boardwalk on the beach. There is Little Italy, Gas lamp district, Balboa Park, tons of museums, and Legoland is about 30 minutes away. I know you can find an awesome vacation package (I did) and if you buy tickets to these theme parks online you usually get a better price.