Have your child's birthday party at COSI! COSI birthdays are a mix of silly science and serious fun! Please submit your reservation at least three weeks in advance.
Please note that selected COSI program reservations are subject to a nominal processing fee. Proceeds from this fee help to support COSI, a not-for-profit organization. For selected programs, transaction fees may be waived for COSI Members as a benefit of membership.
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