I have a lot of great memories of playing with my sister (and watching her play at times, since she was better than me) on the OG Xbox we got for Christmas when I was nine and she was seven. We didn't have anything sophisticated, but I loved the shit out of the movie tie-in game of The Lord of the Rings: The Two Towers and the tie-in/semi-official sequel Star Wars: The Clone Wars (the plot which started on Geonosis and was unrelated to either of the later TV series of that name). Also, the TTT and ROTK tie-in games are responsible for me starting to read Tolkien (and eventually seeing the movies too), so I'm grateful to them for that.