What: Fifth, sixth or seventh annual (no one can remember) Magic Wand Making Workshop with esteemed wand-maker Kevin Brady Cost: Free. All materials provided (wooden pegs, a dowel, plastic beads).

Wands play a major role in the Harry Potter universe, with the ones belonging to Harry, Voldemort, and Dumbledore standing out among all others.

The basic idea is that each wand has a reflector in the tip, which coupled with strong IR illumination makes them glow on camera. This allows for easy gesture recognition using computer vision ...