Swedishmum - DH and I went on honeymoon to Hawaii and came back with a little Hawaian baby bean who turned out to be our wonderful DD who is now 6 YO. We intend to return with teh children to Hawaii for our 10th wedding anniversary so I would defo say go for it.
The flight is long and a bit arduous but they will be fine If it were me, though, I would stop off in San francisco rather than LA. I think SF is a fantastic city to do with kids and far more accessible than SF - stay somewhere at Fishermans Wharf and take the Cable car anywhere you need to
On Hawaii we stayed in 3 places:
Lanaii - The Manele Bay - fab but wouldn't do it with children
Kawaii - breathtakingly beautiful and an absolute must when we return - stayed at the hyatt regency which has great water park thing in the grounds with slides etc that kids would love. Big mini grand canyon for hiking too and the breathtaking beaches where lots of famous films have been made - bit waterfalls as well. Went catermaran sailing round the island which was fab too.
Hawaii - big island - would go back because the kids would love it - volcanos, the observatory for middle of the night star gazing with massive telescopes and midnight picnic, helicopter tours over the volcanos etc etc. Would highly recommend the Hilton where there is a boat service which shuttles round the site dropping off and picking up We had only just arrived at this hotel when we turned on the tv and heard that Diana had been in a car crash - we watched the whole saga unfold at an hour when everyone in the UK was still in bed! All the staff at the hotel were so respectful and treated us like we had known her personally
Can't remember which island we were on, but from one of the islands we took a boat trip to Maui which I would definately add to any trip we make in the future. Lovely place very sophisticated compared to the other islands!
People are right some of the islands can be rainy - but the worst of the rain seems to be very localised and the big resorts are built in the dry parts of the islands.
I'm so excited for you writing this that I can't wait to take my children there - only 2 years to go