All three resorts are kid friendly...it's
Disney ! The most that any of them sleep comfortably is 5.....but I thiink you can squeeze a roll-away into most rooms. The
Disneyland Hotel rooms have (generally) 2 Queens, and the small couch makes in to a bed (not a fold-out). Their rooms also have a little mini kitchen (cabinets, sink, small fridge).
It is a very busy place for kids, lots to do but also quite noisy, and in my opinion, getting a little run down.
Have not stayed at Paradise Pier, but it is similar to DL hotel, but not as many things to do, and also the furthest away.
The Grand Californian is gorgeous, but also the most expensive. To be within steps of both parks was well worth the money. We have had the rooms that have one queen bed, a sturdy set of bunk beds (that would even sleep a not-too-tall adult) and a trundle under the bunk beds. They also offer the option of bringing you sleeping bags. I don't remember if the couch makes into a bed. There is a small fridge also. It has its own entrance to California Adventure, and you can walk right into DownTown Disney from one exit of the hotel and go just a short way and you are at the Main Gates of Disneyland. GC definitely gets my vote.
We loved the Halloween changes at Haunted Mansion, and the Christmas decorations and celebrations are so good that we plan on making Christmas an annual trip. DW and DL are quite different. ALthough DW has a lot of property, not as much of it was used for the Kingdom. You'll be amazed at how big Small World is, and the Haunted Mansion & Pirates. You'll love the Matterhorn & Indiana Jones.
If you go to San Diego, you have to go to Coronado and see the Hotel Del Coronado...beautiful. One of our most favorite things to do also is tour the Queen Mary in Long Beach, it's very, very interesting....the kids even liked it, especially the "haunted" tour.
I'm not a zoo person, so the San Diego Zoo didn't thrill me. Didn't think Sea World was all that much either. Skip Knotts Berry Farm.
Just walking around the wharf in San Fran is a blast, and you could use two days there. Tour the old ships, tour the submarine, and
definitely go out to Alcatraz. Do not miss it!! Plan to walk around and explore on your own, too...besides the tour.
This is very long.....if you have any more questions, feel free to ask!