Girls Preparatory student Faith Guzman, 7, tries out an interactive display at the new National Museum of Mathematics in New York, Monday, Dec. 17, 2012. The museum is aimed at kids aged 8 to 13, 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. (AP Photo/Seth Wenig)

Associated Press
Girls Preparatory student Faith Guzman, 7, tries out an interactive display at the new National Museum of Mathematics in New York, Monday, Dec. 17, 2012. The museum is aimed at kids aged 8 to 13, 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. (AP Photo/Seth Wenig)
Girls Preparatory student Faith Guzman, 7, tries out an interactive display at the new National Museum of Mathematics in New York, Monday, Dec. 17, 2012. The museum is aimed at kids aged 8 to 13, 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. (AP Photo/Seth Wenig)
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