Membership FAQs

Family, Collaborator & Innovator Memberships:

  • Who is admitted free with my Family membership?

    • The parent and partner/spouse, living in the same home.
    • Their legal dependent children under 18 years old, who live in their home and are named on their membership.
    • Unlimited related adults (grandparents, aunts, uncles, any relative over 18 years) when accompanying member children.
    • One unrelated adult per visit (i.e., caregiver over 18 years or adult friend) when accompanying member children.
    • Free admission is not available during blackout dates for fundraising events like Snow Days, or for admission to birthday parties or field trips.

  • Who must be present to receive the member benefits?

    At least one of the named member children must be present to receive benefits.

  • Can I bring in guests for free to the museum if I am a member?

    Guests covered by membership include any related adult (18+) accompanying named member child(ren) and one unrelated adult accompanying named member child(ren) per visit. General admission ($12) is charged for non-member children under 18 years old.

  • How do I check in with my membership?

    For museum check-in, please present either your physical membership card, your eMembership card on your smartphone, or your photo ID at the Front Desk and state the name(s) of the member child(ren) you have brought to play, and any guests accompanying you. Any additional non-member children are $12 each. For assistance or instructions on downloading your free eMembership card please ask the Front Desk staff.

  • Can I share a membership with my friend or other family members?

    Memberships may only be used by the two named adults (parent and spouse/partner) and their legal dependent child(ren). Multiple families, although sharing a home, may not share one membership.

  • Can I drop off my child(ren) with a caregiver at the Museum?

    Yes, the membership benefits include one free unrelated adult guest, such as a caregiver. Please note: caregiver MUST be over 18 years old. Photo ID is REQUIRED at check-in, along with the name(s) of the member child(ren) present.

  • Can I bring my niece and nephew under my membership?


    As a Family, Collaborator and Innovator member, only your legal dependent children may come in under your membership. General admission ($12) is charged for non-dependent children.

  • Why can’t I add my niece and/or nephew who lives in my home to my membership?

    Our Family, Collaborator and Innovator memberships cover two named adults (the parent and their spouse/partner) and their legal dependent children only. Non-dependent children may not be added to a
membership. Failure to comply will result in termination of membership privileges without refund. As a 501(c)(3) nonprofit organization, this policy is intended to prevent any misuse of memberships, which results in loss of revenue and may ultimately result in raised prices.

Grandparent Membership:

  • Who is admitted free with my Grandparent membership?

    • The grandparent and partner/spouse, living in the same home.
    • Free general admission for up to four (4) grandchildren per member grandparent present (Maximum: 8, if both named member grandparents are present) per visit.
    • Free admission is not available during blackout dates for fundraising events or for admission to birthday parties or field trips.

  • Who must be present to receive the member benefits?

    At least one of the named member children must be present to receive benefits.

  • Who can use my membership card?

    Only the named grandparent(s) listed on the membership card can use the membership card.

  • How do I check in with my membership?

    For museum check-in, please present BOTH your membership card AND your photo ID at the Front Desk and state how many grandkids you have brought to play. Any additional adults are $12 per person.

  • Can I share a membership with my friend or other family members?

    Memberships are non-transferable and may only be used by the grandparent(s) listed on the membership. The secondary adult listed on the membership can only be the current partner or spouse of the primary member, who lives in the same home.

  • What if I bring my 6 grandchildren and one of my adult children? Who do I pay for?


    You may bring up to 4 grandchildren for free per member grandparent present. This means up to 8 grandchildren can be brought in for free when both member grandparents are present; additional children and adults are $12 each. In this scenario, you would pay $36 for your adult child and the extra 2 grandchildren.

General Membership Questions (All levels of membership)

  • I paid general admission to the Museum today. Can I use that as credit towards buying a membership?
    As long as the general admission and membership are purchased on the same day, the admission can be credited to the cost of membership. Please note: you will receive admission credit for everyone you paid for, who would be covered by the membership type chosen.

  • Do I get free passes with my membership?

    Only our contributing level memberships come with single use guest passes. Our Collaborator ($350) and Grandparent Club ($500) memberships come with 10 single use guest passes. Our Innovator membership ($650) comes with 20 single use guest passes.

  • May I upgrade my membership in the middle of the year?

    Yes, you may upgrade at any time at the Front Desk or over the phone. Please note that upgrading your membership does not extend the length of the membership; it gives you additional benefits for the remainder of your original membership period.

  • Can I get a refund on my membership?

    As a 501(c)(3) nonprofit organization, we do not issue membership refunds. Thank you for your support and understanding.

  • Can I transfer my membership to someone else if I move out of the area?

    Membership benefits are non-transferable and may only be used by the named members. You can continue to use your ACM reciprocal benefits at participating museums for the remainder of your membership year.

  • How long until I receive my membership cards?

    We now offer eMembership cards, which are ready to download on your smartphone by the next day. Follow the download instructions below, and when you come in, present your card on your phone and give the names of the children with you, and any accompanying guests. (Related adults or caregivers checking in your children without you will continue to show their photo ID and give the names of the member children with them.)
    • In iTunes or Google Play, search for “eMembership Card.” Download and open the app.
    • Choose the Children’s Museum of Sonoma County icon and select “Find My Membership Card”.
    • Enter your membership number (or phone number associated with the membership) and last name
    • Select “Download My Cards”
    • Use the eMembership Card app to view membership benefits and FAQs, and to check your expiration date.
    • Turn on notifications to be notified through the app when your membership is close to expiration.

  • My child’s friend is having a birthday party at the Museum. Can I use my membership to check in for the birthday party?


    Membership does not provide free admission for birthday parties. Birthday areas and activities are exclusively for party hosts and their guests, and are not open or available to members or the general public. Party packages include the cost of admission for 30 people in the indoor party space and 40 people in the outdoor party space. There is a $12 per person charge for any guests over the 30 (indoors) or 40 (outdoors), regardless of membership status.

  • What is the ACM reciprocal network?
    ACM stands for the Association of Children’s Museums. We participate in the ACM network, which allows CMOSC members to receive discounted admission at other participating children’s museums across the country. Present your valid Children’s Museum of Sonoma County membership card or eMembership card (in the eMembership Card app, NOT Apple Wallet) at any of the 200 reciprocal museums across the country to receive 50% off general admission for up to six people, including the cardholder. For a complete list of ACM Reciprocal museums, click HERE.

  • Why can’t I download the eMembership card to Apple Wallet on my smartphone?

    When downloaded in Apple Wallet, the eMembership card does not update automatically upon renewal and does not show the ACM reciprocal logo. Card must be displayed in the eMembership Card app to receive ACM benefits at participating museums.

  • What if I forgot my membership card and I’m visiting another museum that is part of the ACM network?

    Please call our Front Desk Team during regular business hours (Wednesday through Monday, 9am to 4pm PST; closed Tuesdays) at (707) 546-4069 to verify a current active membership. If you have downloaded your free eMembership card on your smartphone, you can present it along with a photo ID to receive discounted admission for up to six people.

  • Can I bring a guest, who is not a member, during Member Mornings?

    Yes. Members are allowed to bring in guests during Member Mornings. Depending on your membership type, your guests may, or may not be admitted free under your membership.

  • Will I be notified when my membership is expiring?

    We will notify you via email (be sure to check your spam folders) 15 days before your membership is to expire. Your membership’s expiration date is also located on your physical member card and displayed on your free eMembership card.

  • Depending on the level you purchased your membership may, or may not be tax-deductible.


    • Family ($160) - NOT tax deductible
    • Collaborator ($350) - Tax-deductible $85
    • Innovator ($650) - Tax-deductible $85
    • Grandparent ($160) - NOT Tax-deductible
    • Grandparent Club ($500) - Tax-deductible $220

  • What if I lost/forgot my membership card?


    If you are visiting and you do not have your membership card, present a valid photo ID at the Front Desk to access membership benefits.

  • I still have additional questions. Who do I ask?


    You are welcome to speak to the Front Desk staff in person, or to contact us via email at members@cmosc.org, or by phone during regular business hours at (707) 546-4069.


Have Questions?

Membership FAQs >

Call: 707-546-4069
E-mail: members@cmosc.org