The most-printed model in Thinger's activity data this week is a marble run. Not a cable clip, not an organiser, not a calibration cube. A marble run, with an estimated 820,000 prints worldwide. I have been watching the weekly trends data for a while, and when something jumps to the top of the list it is worth asking why.
The answer here, I think, is this: the four trending models at the top of the list this week all share the quality that makes the marble run compelling. They do something. A gear turns. A jaw opens. A shuttle carries a thread across a warp. These are the prints you pick up and hand to someone who does not own a printer, and that person immediately understands why you own a printer. They are worth making for that reason alone, and with the holidays eight weeks out, they are also worth making soon.
Key takeaways
- The Duplo compatible marble run system by joachim67 (Thingiverse) is the most-estimated-printed model in Thinger's data this week at around 820,000 prints, and connects directly to standard Duplo bricks already in your household.
- The badBrick Worm and Tree Gear Set by badBrick (Thingiverse) is Lego Technic compatible, printing a working worm gear and 24-tooth driven gear as a mechanical demonstration you can hand to someone.
- The Mini Inkle Loom by Zydac (Thingiverse) prints a portable weaving loom that clamps to any table or straps to your leg, producing a tool for a completely different craft rather than an object.
- The Alligator Skull by MarkPalmer (Thingiverse) has a snap-together jaw hinge, prints in three size variants, and articulates realistically.
- All four are in this week's Thinger trending models list, where the weekly activity data updates every Monday.
The marble run
Duplo compatible marble run system by joachim67 on Thingiverse is the week's most-printed model for a reason I find entirely persuasive: it meets children where their toys already are. The track sections connect directly to Duplo bricks, so the marble run lives in the same world as the Duplo construction on the floor rather than beside it. You build the starting structure from Duplo, drop the printed track onto it, and a marble rolls through the printed section and back into the Duplo base.
The system includes straight sections, ramps, crossing pieces, and corner ramps, with an OpenSCAD source file available for remixing. That parametric file means you can adjust the track proportions or add new piece types if the set does not include the specific section you need. One print session gets you a functional run. Four print sessions get you something that changes direction twice, crosses over itself once, and drops across three levels of Duplo architecture. The weekend tends to disappear.
The gear set
badBrick Worm, and Tree Gear Set by badBrick on Thingiverse is Lego Technic compatible, and that compatibility is what makes it interesting rather than just educational. A worm gear reduces speed and multiplies torque: one full rotation of the worm moves the driven gear by exactly one tooth. The gear ratio is steep, which means very little input force moves a meaningful output load. This is the mechanism inside most power screwdrivers and self-locking winches, and it is significantly easier to understand by holding one in your hand than by reading about it.
Because the gears mate with Lego Technic axles and connectors, the output shaft can drive other components in a kit. You can build a vehicle, attach this gear reduction at the wheels, and end up with a slow powerful drivetrain from what was otherwise a standard Lego assembly. The designer notes that this is a sample from a fuller gear catalog under the badBrick Thingiverse account, if you find the worm gear leads somewhere more interesting than you expected.
The loom
This one sits apart from the others. The Mini Inkle Loom by Zydac on Thingiverse does not produce a 3D printed object you display or play with. It produces a tool. The tool, once printed, lets you weave. Inkle weaving is a tablet-weaving technique for making bands and belts: warp threads go over the pegs, a shuttle carries the weft, and the result is woven fabric.
The loom clamps to any table using two printed C-clamps, and there are slots in the clamp holders to thread a strap so it attaches to your leg for portable weaving. The designer mentions weaving on a subway. The loom is small enough for a bag. I find this a genuinely interesting use of a printer: the print is the beginning of something that has nothing to do with 3D printing, and the skill you end up with is an old one. The loom is the new part.
The skull with a jaw
Alligator Skull by MarkPalmer on Thingiverse is a remix of an earlier anatomy scan, and the thing that distinguishes it from the original is the addition of a snap-together jaw hinge. The upper and lower jaw are separate prints that click together and articulate, so the skull opens and closes. Three size variants are included: standard scale for a Replicator 2, 50 percent scale for a smaller bed, and 170 percent scale for a larger one.
The snap jaw is the detail that makes this print worth picking up off a shelf repeatedly rather than once. The skull is anatomically accurate enough to show the tooth arrangement and the orbit geometry at a glance, but the jaw hinge is what makes it a demonstration rather than a static object. Children who ask questions about crocodilians will get at least half of their questions answered before they stop opening and closing the jaw. Adults are not significantly better.
Before you print
All four of these are standard FDM prints. None need resin or special materials, and none require supports for the main body (the alligator skull assembly involves two separate pieces rather than support removal). The marble run adds up in filament faster than it looks, because a useful run needs ten to fifteen pieces. The print cost calculator will tell you what each section costs in filament before you commit to printing the whole set.
The full list of this week's trending models, including the eight not featured here, is at api.thinger.rocks/trends. The free Thinger app lets you search over 600,000 free models from Thingiverse, Printables, and MakerWorld. Search "marble run", "gear", "inkle loom", or "alligator skull" and each of these categories runs deeper than what one article can cover. The app is the faster way to build a print queue than scrolling Thingiverse one model at a time, and the queue is there for whenever you get back to the printer.
Top comments (0)