I marvel at my three year-old's ability to manipulate the iPhone and iPad. He's not a genius as I have heard similar stories from other parents. The fact is, he came to it with a clean slate. He didn't have any preconceived notions about how it should work, how previous tools compare, or its limitations. I didn't have to explain it to him. It has one button and endless possibilities with the touchscreen and he was happy to figure it out with trial and error. He's clearly as comfortable with the device as my sister (see below) and can spend hours playing games, surfing YouTube, and looking at pictures.