Coronado, La Jolla is the best!!!
And if you want fun for the kids, Pay and go to the Silver Strand Beach Park, and over to the Bay.
Mission Beach, you can rent all kinds of toys to play with.
La Jalla, will just knock your socks off, and has great bars, real close to the beach, and a Ramada INN real close, get a room for the day and hang out there, in La Jolla it's 100.oo a night/day for a real nice clean room, the kids can relax, you'll have a place to change your clothes, and wake up their or the kids can nap, so can the adults, and you can sohwer before you go back downtown!!!! That's what i would do, take turns watching the kids, and be sure to go thru the caves from the gift shop down to thru the cove, and buy shells and lot's of post cards, and mail one to yourself for a memory of a lifetime!