- Taking a ferry
- House of Air for extreme trampolines
- Visiting Chinatown with $5 each to spend (a favorite activity of mine when I was a girl)
- Visiting the Musee Mecanique and getting clam chowder in bread bowls
- Bike riding along the waterline
- Pizza in North Beach
- Exploratorium (of course!)
Where would you take two pre-teen boys in San Francisco?