National Geographic for kids:  https://kids.nationalgeographic.com/

Fact Monster:  http://www.factmonster.com/states.html

State Puzzle:  http://www.yourchildlearns.com/puzzle_us.htm

State Quiz:  http://www.lizardpoint.com/fun/geoquiz/usaquiz.html

Raven's Quest:https://www.tvokids.com/school-age/ravens-quest