I really enjoy how you make me think beyond my day-to-day considerations and get myself 'outside the box'.

So - if I could send back something but had no idea who would get it, I don't think I would dare send anything that was technology related as it just would not work. Electronics would not have 'value' I don't think as the background infrastructure to make them work isn't there (yet). There was/is a short story about an inventor who was able to jump back a thousand years in time... no more, no less and he took with him several modern artifacts and tools to impress the natives and establish himself as a wise leader. Nothing he took worked was the end result and he died viewed by the locals as a crazy person.

As it would be 1918 and the War to end all Wars (WWI) would be finishing up I am unable to come up with anything that would be interesting to send that would not shift today (information and the good old Science Fiction time paradox) into something we would not recognize today.

However, if I could target it at 50 years and send it to me, well then - it would be a simple note to buy apple stock when it comes out! Really I should also send some pictures of now and also some notes on how life will work out and don't let the crappy times that are coming get to you as it's all ok later in life.

I always liked the Dennis the Menace cartoon where little Dennis is on his trike talking to friend Joey saying "Boy, what I wouldn't give to be five again and know what I know now." It's sort of like that...