congratulations and what a fun post to ponder. i grew up with a sister 10 years younger than me. i don't remember her getting into the Castlevania games i played, but it didn't take her long to beat me in Street Fighter. one thing that she loved was playing as a girl character that she could relate to, first Chun Li, and then even more so, Sakura. perhaps along the same lines a game with a young girl protagonist who you're daughter could relate to might be the right thing. guess that would have to be Maria in Rondo of Blood or Portrait of Ruin, or Carrie in C64 and Legacy of Darkness. of course, there's plenty of scary stuff in any Castlevania game, so I don't know what the proper age is for introducing this is. i guess it depends on the individual.