Why should I make a donation to the Children's Museum of Sonoma County?
The Children's Museum experience is the right of every child, so we subsidize every admission and membership by 50%.  While this keeps access affordable for many families, it requires the Children's Museum to fundraise to support staff, programming and outreach.  This is only possible through the support of individuals like you!

Iím a member Ė isnít that enough?
Being a member is a great start, but membership dues make up just 30% of the Museum's revenue budget. We need your donation to keep the Museum affordable, employ talented staff and create dynamic programming for every child.

Annual Fund

Help CMOSC reach even greater heights by making a generous gift to the Annual Fund.  Itís quick, itís easy, and itís 100% tax-deductible!  Make your gift today by giving extra with your annual membership payment, giving in response to an appeal, establishing monthly or quarterly recurring contributions, making a gift in stock, or donating online.


Circle of Innovation

Play a leadership role at CMOSC by joining the Circle of Innovationóthe Museum's premier category of individual giving.  The Circle is designed for gifts of $1,000 and above and offers unique benefits, which CMOSC reserves for its most committed friends. You can join by making an annual gift of $1,000 or greater, or by establishing a monthly or quarterly recurring gift for as little as $84 per month! Make a three-year pledge and become a member of the Imagination Society.

Find out more >>


Join the sustaining force behind science, art and nature exploration at the Children's Museum of Sonoma County. After an opening or expansion, many museums experience a transition period of three years that stretches the capacity of the organization. The Imagination Society was created to ease that transition for CMOSC by providing a stable and continual source of operating funds, enabling growth in programming and community outreach. Imagination Society donors pledge anywhere from $1,000 to $100,000 annually for three years, which includes donors in the Circle of Innovation.

Matching Gifts

Many companies match $1 for $1, or even $2 for $1, for the gifts that employees make to nonprofit organizations. Some even give financial donations to match volunteer time by employees. Ask your human resource department for the matching gift policy of your place of employment, then submit their required paperwork along with your donation to make your gift stretch even further.

To learn more about any of these giving opportunities, contact Kristyn Byrne at 707.546.4069 x103.


The Children's Museum of Sonoma County is committed to practicing exemplary stewardship of the funds and contributions entrusted to us. Below is a link to our annual audited financial statements and Form 990.

CMOSC FY14 Audited Financial Statements.pdf 720.6KB Apr 23, 2015 5:06 AM

The Childrenís Museum of Sonoma County was founded in 2005 and is designated as a tax-exempt nonprofit charitable 501(c)(3) organization by the Internal Revenue Service with the Tax ID #20-3496878.

Mail checks to
P.O. Box 12323
Santa Rosa, CA 95406

Please click HERE for credit card privacy statement, terms of use and return policy

We also accept donated items:
Tables, chairs, duck tape, art supplies, Canon Pixma 6700D #8 printer inks, printer paper, 9x12 envelopes, diapers, toiletries, storage space for exhibits and supplies, coffee at events.

We're happy to consider anything you wish to donate. Even items you might not believe to be in good enough condition can be refurbished and turned into a creative new exhibit. 

Please email if you'd like to donate something to the museum.