Most Helpful Girl
I played kinect or something like that with my little cousin I think you can add it do the Xbox and basically it's child friendly adventures that you play without a gamepad you just have to move your body it's quite cheap and he has a lot of fun.
Most Helpful Guy
Give him Spore. You basically start out as bacteria in the sea and then you continue to evolve into animals and then into tribes and then civilizations and then into space n shit. And no it's not complex at all - it's a pretty comedic and childish game and easy to grasp methinks.