Already did. Started off letting her watch me play Space Channel 5 when she was maybe two years old (taught her right and left!). Got Super Rub a Dub for the PS3. Really good game for kids, btw. Try the demo. Then, I got Feeding Frenzy for the 360 to teach here the nuances of the analog stick. I remember explaining "Eat the fish that are smaller. Dodge the fish that are bigger." She was also my co-pilot in Super Mario Galaxy, Shank, World of Keflings, and many more. She LOVES playing co-op with me. She's even decent at Call of Duty Black Ops online.
Now, at the age of 11, she's beaten Bully, Red Dead REdemption, The Maw, Resident Evil 5, Gears of War, The Simpsons Game, Lego Indiana Jones, and a ton of other games. She's gotten really far in games like Alice the Mandness Returns, Fable II. Zack and Wiki, and many others. She never leaves the house without her 3DS. I'm proud of her.