shall not knowingly be present in or loiter within five hundred feet of any real property comprising any public park with playground equipment, a public swimming pool, athletic complex or athletic fields if such facilities exist for the primary use of recreation for children, any museum if such museum holds itself out to the public as and exists with the primary purpose of entertaining or educating children under eighteen years of age, or Missouri department of conservation nature or education center properties.
§ 566.150, RSMo