The Children’s Museum offers unique and generous membership benefits designed for flexibility. All memberships include unlimited visits for one year.

Family Membership - $170

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Grandparent Membership - $170

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Family Access Memberships

CMOSC strives to make the Museum accessible to all families. Our Family Access program provides discounted memberships, starting at $20, to income-eligible families. A Family Access membership is valid for 1 year and provides your family with the following benefits…

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Download your CMOSC eMembership Card on your smartphone

1.     In the App Store or Google Play, search for “eMembership Card”

2.     Once downloaded, open app and choose Children’s Museum of Sonoma County

3.     Select Find My Membership Card

4.     Enter your phone number and last name

5.     Select Download My Cards

6.     For faster check-in, scan card at the Front Desk and tell the attendant who is with you!

Need help?  Call the Front Desk at 707-546-4069 during regular business hours.

DOWNLOAD INSTRUCTIONS in English & Spanish >

Reciprocal Admission Discounts

Your CMOSC membership card is the key to unlocking discounted admission at 200 children’s museums nationwide, as well as discounted admission at neighboring organizations.


Membership FAQs


The Children's Museum of Sonoma County is an independent, nonprofit 501(c)(3) organization that relies on membership and admission fees as well as philanthropic support to cover operating costs, which include exhibit maintenance, facility upgrades, program development and much more. Our terms and conditions are intended to prevent misuse and abuse of memberships, which result in significant loss of revenue for the Museum. We appreciate your understanding and support.

Children's Museum of Sonoma County's tax EIN is 20-3496878.  Memberships are tax deductible to the fullest extent of the law. Consult your tax professional or financial adviser for more information.