Christmas Lights (STEM Club Activity)

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As we approach the Christmas season, STEM clubs often look for festive activities.  It can be hard after the inevitable Christmas Crystal Christmas Tree and "making decorations".  So how about this..  £1 from your favourite pound shop buys 8 LEDs and a battery holder:

Replacing the white LEDs with RGB flashing LEDs is simple.  Add some heat shrink sleeving and it's better than new.

Video make: (yes, I know I needed to lock focus, but I got carried away).