Some useful links
www.raspberrypi.org – home of the Raspberry Pi computer.
www.pimoroni.com – One of my favourite UK maker shops – with forums and a learning zone. Get lovely Adafruit stuff from here
www.adafruit.com – The Maker shop with forums and a leaning zone.
www.pololu.com – US robot stuff
www.piborg.org – UK robot stuff, home of DiddyBorg