Let Frommer's show you where your kids can: Visit the sea lions, the city's most famous residents Test their pitching arms Lear what life was like on "The Rock" Play the latest video games Cross the Golden Gate Bridge on a fire truck Conduct amazing experiments at a hands-on science museum Climb around on a giant Coca-Cola bottle Get on an Australian walkabout, complete with kangaroos Join the grownups at an all-ages music club Live out their favorite nursery rhymes Plus invaluable travel tips on: Age ranges for each sight and activity Hotels that offer cribs and rollaway beds A complete rundown on restaurants with kids' menus Shopping for everything from baby booties to import CDs A San Francisco parent's words of wisdom on safety in the city