Hiya Jen, we went to california last year and had an amazing time, we traveled to San Fransisco to L.A to Grand Canyon and then to Las Vegas. I have tried to compile of a lists of musts and sights/tours etc. Although ,I cant remember as much as I wish I could!
San Fransisco - We spent the first three days in San Fransisco and was totally amazing experiance. Be prepared for alot of fish markets around and lots of friendly seals. It's quite amusing just walking the streets, you get alot of strangers doing tricks/comedy acts on the side, I remember one man would hide behind 2 potted plants and then jump out at people as they walked by, very very funny! The main attraction, alkatraz is an amazing attraction and I personally think its best seen at night, although its still amazing in the day, It's a must for any one who has the chance to visit such an amazing city with a classic history. The tours on the island are also a must, there are guided and audio tours which you can do at your own pace, be prepared to walk alot though

. I remember there being a few attractions for children, specially in the main shopping area but more of the attractions are tours and sight-seeing rather than actual "Theme Parks". There are alot of shops to buy gifts from, all along the main road, you could spend a whole day shopping. The variety of food they sell in san fransico is crazy, they have everything from Maxican, American food to Fish, Chinese, Indian, there will be something for everyone! Are personal choice was the Hard Rock Cafe whats always fun, specially for the kids. There are alot of tours that you can purchase and I highly reccomend as many as you can fit into your visit. You get to learn about the city a whole lot more on these tours, including where they filmed Mrs Doubtfire

. There are some amazing gardens and buildings in San Fransico and on the yours, I remember they took us to one of the highest points in the City and you could see everything, amazing experiance and defently worth taking a photo (Will post one later if i can find it

). Overall I think its a great attraction in itself even if you have kids or are on your own, dont miss out on the tours
L.A - L.A was another amazing experiance full of fun! Firstly, there are alot more attractions in L.A including theme parks such as "Unverisal Studios" what we acutally did, even though its basically the same as the Florida version, it was still another great experiance. Although there alot more attractions we only did Universal Studios as we did not have alot of time in L.A. Again, the tours and the sights seeing is what made it such a fantastic trip. The sights I suggest to visit are, Chinese Theatre, Hollywood Sign (You can get pretty close), The highly exspensive shopping streets, you see alot of stars and of course Beverly Hills. Although I do suggest doing the tours which acutally take you to all these places and even let you visit all the celebs homes etc. I do not have much information on the food as we generally eat in the hotel but from what I could see and smell

there seemed to be alot of variety like San Fransico.
Grand Canyon - The Grand Canyon was a trip in itself, truly an amazing experiance and a MUST see if you have the time. If you do have the time to visit such an amazing sight I suggest seeing it from the air with the Helicopter Tour, although you do drop 5,000 feet what made me bring up a cream egg. The food and attractions are at a limit here but still have a good variety for the kids but I suggest if you are taking the little ones not to spend more than 3 days here, they can get quiote bored

. Be prepared to see anything though, we even had snow and saw some maniacs climbing around the canyon, too risky for me!
Las Vegas - Wow, Las Vegas, another trip in itself, the lights the sounds the taxis

. Where do I begin.... The casinos, there are many to visit and many to gamble in, alot of them are great to visit because of the shows and animals within them, its not just all gambling in Las Vegas. They even had a mini Sea World with dolphins and sharks and whales

. The nightlife in Las Vegas is generally better as you probs have heard, the water shows are a must see, they are truly amazing. Us and are tours, we did another tour within a Helicopter over Las Vegas at night for my sisters birthday, if you can do this I highly reccomend it, will be somethign I will remember for ever. Although I cant think of the name of the top of my head you MUST visit the building where the roof is painted like the sky and you actually feel your outside

. Gotta head out now. Again, the variety of food is great, alot like San Fransisco, although the nightlife can get the kids tired easily. Wish I had time to tell you more and will hopefully post some pictures later on or you can PM me.
If you have any specific questions, please let me know!
Have Fun