I think everybody has at least a mobile phone. It is useful, comfortable, fun and necessary.
Virtually, all devices have a remote control. I think soon children will have also a remote control. It would be very practical.
Memory card is all around. It is great because it is like a Liliput worl information.
Do you need to feed? But you haven't got time?. Ok, welcome to Western Culture. No problem. Here you are the microwave oven the supporting of your life.
Probably MP3 player is only thing you have in order to can take bus and underground.