Yeah, Burnout Paradise, Pure, and NFS: Most Wanted (2012) would all be great games (but 2 player split screen racing is rarer these days, so I might recommend Blur above all those). My nephew (12) is getting a 360 this Christmas so I have been thinking through this as well. A lot of fun to be had with the mentioned Rayman games (there are two, Origins and Legends I think), Marvel: Ultimate Alliance, etc. But for my nephew, #1 on his list was Minecraft Xbox 360 Edition, even though he already owns it on PC.