Closed-toed neakers - either athletic or split-sole dance sneakers - are required.
(Note that running shoes usually have the wrong kind of traction for hip-hop glides - try to avoid a running shoe.)
Boys: athletic pants or shorts. Solid color athletic shirt. Athletic socks.
Girls: any color and style leotard. Tan tights. Lycra dance "booty' shorts or leggings may be worn for extra modesty and fashion.