What should I get my little sister for her birthday ... I need ideas?

OK, she's turning 6 but she's not a normal 6 year old girl at all. She doesn't care for barbies or ponies or anything like that. She watches stuff about wars all the time (Civil War and WW1 and WW2 are her favorites), she was reading when she was barely age 3 and now she's reading Nietzsche. She's fluent in both English and Arabic and she's learning French now. Her heroes are Abe Lincoln and Winston Churchill. So I have no idea what I should get her and it needs to be something I can order or get in Doha.