My Science Box

Getting Ready

1. The Point Bonita Lighthouse is only open on weekends and Mondays from 12:30 to 3:30. To have a docent or ranger open the lighthouse tunnel for you on other days and times, contact the National Park Service at (415) 561-4754.
2. Arrange transportation to the Marin Headlands and around the park.
3. Gather materials:

• small ice chest, ice, water, cup and Magic Shell for the pillow basalt demonstration
• hand lenses and cookies for chert observations
• map of California for putting it all together