Saturday, June 12, 10 am to 2 pm
Saturday, August 7, 10 am to 2 pm

Kids and grown-ups alike will get creative with natural materials in an outdoor Presidio setting.
The ingredients for the day include wood, leaves, stone, pine cones, bark, branches, water, and imagination.
Bring a picnic lunch or snack. Meet at the Exhibition Pavilion.

Last weekend me and my son joined Opening Day Celebration for Presidio Habitats. With given map we explored part of the park at Fort Scott we never seen before including amazing outdoor art installations. We also were given a Presidio Quest for young naturalists made by our friends from http://urbikids.com and planning to come again there to complete it. 

Here is some info about the Presidio Habitats exhibit which will be open during May 16 2010-May 15 2011.

Presidio Habitats is organized by the FOR-SITE Foundation in partnership with the Presidio Trust. 
Open: May 16 2010-May 15 2011
Location: Corner of Storey and Ralston Avenues, Presidio Park, SF

• Outdoor installations are located along Presidio sidewalks, historic paths, and trails.
• The exhibition starting point—the Exhibition Pavilion—is at the corner of Storey and Ralston, across from the Log Cabin in the Presidio's Fort Scott District.
• Parking at Fort Scott.
• The Exhibition Pavilion hours through October 31, 2010: 11 am - 5 pm, Wednesday-Sunday

About Presidio
 from http://www.for-site.org/site/the_presidio/

History
The Presidio of San Francisco is a 1,491-acre national park site and is part of the Golden Gate National Recreation Area. The Presidio was in continuous use as a military post from 1776 to 1994, spanning the Spanish, Mexican, and United States periods. In 1994, after the post became excess to military needs, it was transferred to the National Park Service.

Resources
The Presidio in its entirety is a National Historic Landmark District. It houses one of the finest collections of military architecture in the United States with approximately 469 historic buildings contributing to its landmark status. The Presidio’s landscapes, including the historic forest, Main Parade Ground, golf course, San Francisco National Cemetery, and historic gardens, also contribute to the park’s landmark status. The area’;s transformation from mostly open dunes into a richly forested and designed setting is one of the Army’s most impressive accomplishments in landscape architecture.
Over millennia the Presidio’s geology, topography, and climates created a mosaic of natural landscapes. Many generations shaped these wilds, from the Native Americans who were first sustained here to the Spanish, Mexican, and American settlers who brought their traditions and created an enduring military presence at the Golden Gate.
The Presidio is a refuge for once-abundant and diverse ecological communities that have been all but lost in the urban Bay Area. The park’s remnant natural areas contain some of the last examples of San Francisco’s once-extensive dune and serpentine native plant communities. The Presidio is home to thirteen different native vegetation communities supporting 300 native plant species, ranging from wildflowers to oak woodlands. Sixteen are rare or endangered, including five protected by the Endangered Species Act. Examples include San Francisco lessingia, Presidio clarkia (wildflowers found in only two locations worldwide), and Raven’s manzanita.
The park’s habitats support a wide range of wildlife. More than 200 bird species ranging from year-round residents like Anna’s Hummingbirds, Red-shouldered Hawks, and Great Egrets to migratory species like Violet-green Swallows and Red-throated Loons can be spotted here. Migratory invertebrates, such as monarch butterflies, also visit the Presidio. The park is home to mammals, reptiles, and aquatic species, including the native gray fox, alligator lizard, and three-spined stickleback fish.