All of my nephews (ages 2, 2, and 3) can use my iPhone. They can also use: television remotes, computers (actually knowing how to get to the internet.. kinda scary), iPods, digital cameras, DVR, Nintendo Wii, and PS3. Well, I could list a plethora of things my nephews can do, but I think you get the picture here.
It makes me mad when they demand to watch Dora, because they know they can get it through DVR. Spoiled. 😛