Father's Day is coming up and I usually just send a card (when I remember..) as I live about 120 miles away from my parents. On this occasion, having just been on holiday, I will be sending some gift chocolate because it is easy to package up and post.This got me thinking about the development of slim, lightweight feature-packed goods that now dominate our culture. There are a whole army of electronic goods such as mobile phones, ipods, pen-drives and the like which would make great gifts...