In this Dec. 13, 2012 file photo, children play at the National Children's Museum in Oxon Hill, Md. The National Children's Museum plans to return to the District of Columbia next year, just two years after moving to the National Harbor development in Prince George's County. Museum officials said that they want the institution’s new home to be near a Metro station and to have plenty of room to expand. The board decided an expansion at National Harbor would be unaffordable, said Ross Hechinger, chairman of the museum’s board of directors. (AP Photo/Jacquelyn Martin, File) *FILE*
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