Ho! Ho! Ho! Did you ever wonder how Santa knows so readily who's been naughty, and who's been nice? Well, he could obviously check your social media profile, but Santa is a bit old school. A bit retro. He uses the Naughty-or-Nice-o-Matic!
Check out the sleek CRT scanlines, and the crazy 50's angles! The Naughty-or-Nice-o-Matic is a piece of rocket-age science that is bound to bring joy to your modern Christmas.
The main feature of this print is the screen! As you may have guessed, there are two potential displays, between which one switches by sliding a panel underneath a grille, and thereby exposing a different part of the display. Naughty! Nice! Naughty! Nice! The grille element has flexing catches that keep the screen panel in place, and allow it the 1mm movement needed to alter what's shown.
In terms of assembly, the lid and base are set up to allow M3 bolts to tap into the case. However, the printable bolts will also fit. Or, you can just glue it all together, which works just fine, too.
This object was made in Tinkercad. https://www.tinkercad.com/things/hsYhChl1G1y