Christmas gadget buying suggestions

I was going to do a Christmas buying guide but I haven't really got around to it.

Instead, see below for some gadgets I would happily like to receive / that would go down well with a gadget enthusiast:

Christmas trains for TFL and south west trains around London

http://www.tfl.gov.uk/assets/downloads/festive-leaflet.pdf 

http://www.nationalrail.co.uk/service_disruptions/seasonal/Christmas_2011/sw.html