What did a steel ball have to do with Christmas? Fun! Same for penguins. :)
I'll help, but I'm sure I've asked this before:-
What have penguins got to do with Christmas?
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I'd like to do one too, but would prefer a ball-bearing run, which is less visually stunning, but more manageable/portable :) I saw a guy upstairs at Maker Fair UK this year, with ones made out of copper wire. He's been there pretty much every Maker Fair UK I can recall. Still not 100% reliable without tweaks ;) balls falling off occasionally on his too. Currently distracted by Wearables and Nixies...