We recently visited Manchester’s latest Mini-Maker Fair. There was lots there to entertain my 2 boys (or 3 if you count the husband) – especially my eldest son. Amongst the various activities on offer, he did his first soldering session to make a flashing badge (and has a small burn to show for it) attended a Minecraft hacking session, and 3D printed a miniature robot. We also attempted to make our own doodlebot. This involved using a simple motor which was wired to a battery, and taped to a piece of card.  Holes were punched into the corners of the card, and the tips of the pens pushed through. We…