During the last session the pupils were testing the electrics and checking that the LEDs worked. Fortunately all did, but we did discover an issue that means I need to do a little bit of "homework" before the next session.
The plan had been to use Sugru to set the wires onto the contacts, but unfortunately this did not work effectively, and so I have the weekend job of soldering the wires to the LEDs. I'd love to get the children involved with soldering the contacts, but I can imagine the health and safety forms that would need to be filled in if one of the group were to suffer a burn.
It's less hassle to solder them myself.