A small 3D-looking printer on your wrist. The part on the bed gets taller through the hour, so its height shows the minutes. Each hour prints a different object, like a cube, vase, gear or rocket.

The digits are drawn as solid outer walls. Inside them, an infill pattern grows as the minute passes. The pattern changes every hour (lines, honeycomb, wavy gyroid, triangles), so you can roughly tell the hour from the pattern.

A copy of the classic blue-and-white printer display. “Nozzle” temperature shows the hour, “Bed” shows the minute, the progress bar shows how much of the day has passed, and a fan icon spins in the corner. It’s a good joke for people who know the look.

An analog face built around a spool. Filament slowly unwinds through the day, so the amount left is how much day is left. The hour hand is the filament path into the extruder, and the filament color changes every hour.

The digits get printed from the bottom up. A small nozzle sweeps left and right, laying down one line per pass, and when the minute changes the old digits drop off the bed and a new print starts. Without a seconds display, the speed of the nozzle is the animation.

Keep an eye on all your 3D printers from a Pebble Time 2. Add Klipper, Bambu Lab and Prusa printers from your phone, then see progress, time left, temperatures and layers at a glance, and get a buzz when a print finishes or needs you.