National Museum of Mathematics (MoMath)

The National Museum of Mathematics, usually called MoMath, is a highly interactive indoor museum where children learn by moving, building, racing, drawing, and testing ideas. Its permanent Chelsea location opened in 2026 at 635 Sixth Avenue. The two-story museum covers about 46,000 square feet and has more than 70 exhibits, including new displays and returning favorites.

There is also a dedicated space for early learners.

This is a strong choice for school-age children who like puzzles or physical challenges, but children do not need to think they are good at math. Current exhibits invite visitors to ride a trike with square wheels, adjust a track to find the fastest route, paint digital patterns with symmetry, explore motion using their whole body, and build unusual three-dimensional forms. Younger children can focus on color, shapes, movement, and cause and effect.

Tweens and teens can spend more time working out why each surprising result happens.

Plan about two hours for a normal family visit. Three hours may work better for children who want to repeat activities or solve every challenge. The museum is open from 10:00 AM to 5:00 PM seven days a week and closes on Thanksgiving.

It also posts occasional early closures, including some program days, so check the official Visit page on the morning of your trip. Children under 16 must remain with an adult.

Advance general admission currently costs $30 per adult and $20 for ages 2 through 17, making a standard family-of-four total $100. Children under 2 are free. MoMath typically schedules two Free Play days each month, and eligible ASTC Passport members may qualify under distance rules.

The museum is near several subway and bus lines, while driving adds friction because there is no museum garage and Chelsea street parking is scarce. Capacity can also create an entry wait, even for members. The official pages do not clearly confirm stroller, nursing, changing, or food arrangements at the new building. Families needing those services should call before visiting.