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Welcome to Additions: the official shop of the National Museum of Mathematics

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How To Return An Item

Your item must be in its original unused condition to be returned, unless there is a manufacturer defect. Your must return the item within 30 days of your purchase.

1. Please email additions@momath.org to request a refund.

2. Mail your returned item to:
     Additions
     Museum of Mathematics
     11 East 26th Street
     New York, NY 10010

3. Include in your package the original receipt and a signed letter stating the reason for your return.

Return Exceptions

Some items cannot be returned if they are opened. These include DVDs, software, and other media.

Merchandise that has been worn, used, or altered will not be accepted for return or exchange.

Restocking Fee

All returned items are subject to a 10% restocking fee; this will be deducted from your refund. The original shipping and handling paid on the order will not be refunded.