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National Museum of Mathematics

A door handle in the shape of pi is seen at the new National Museum of Mathematics in New York.

National Museum of Mathematics

Located in Midtown Manhattan, New York City, the museum is aimed at children aged 8 to 13. The designers and curators have given the place a playground feel. The 40 exhibits include a "wall of fire" made up of laser lights that teaches kids about geometry and a square-wheeled tricycle that still manages to produce a smooth ride thanks to a wavy track.