They just did a study on this and talked about it on NPR. They compared 3-5 year olds against college students and tested them on figuring out a new device and what pattern it takes to get a light to turn on. Adults kept trying the same pattern even if it didn't work the last time and kids move right on and think outside the box. It's just easier for kids to figure new devices out than adults but that doesn't mean older people can't learn technology if they want.