Ready, set,
PRINT!

The designer says this version needs no supports or infill. Use the AD5X profile and check the tail in Preview. Paint details later if you want.

By Hyper, remix of Patrickart. CC BY-NC-SA 4.0.

Designed without supports; about 5 cm tall. Use AD5X 1.75 mm PLA and its default 0.4 mm nozzle. The maker used a different printer and 3 mm filament, so use the AD5X presets. The illustration here is original; see the creator’s photos on the model page.

By Agustin Arroyo / Flowalistik. CC BY-NC-SA 4.0.

One STL. Check the slot against your sleeve or top loader before printing. Test with a spare card; keep valuable cards in a protective case. Print settings are linked by the creator on their model page.

By Dominik Nguyen. CC BY-NC 4.0.

Holds about 64 sleeved cards. Download the three STL files, and print the cap twice. Print separate parts in their colors. A grown-up glues the button and lower parts as the maker describes. Check fit with a spare sleeved card first.

By tonyk. CC BY 4.0.

Use Creeper_NO_SUP or Creeper_NO_SUP_FACE_EXT with the 0.4 mm nozzle, 0.2 mm layers, and 20% gyroid infill. Do not repair the mesh; that removes built-in supports. Turn off Detect Overhang Walls. The SUP variants need supports under the floating legs. A grown-up frees the joints gently.

By Delphant. CC BY-NC 4.0.

A multipart prop. Read the creator’s assembly photos and print the parts separately. A grown-up checks each part fits the 220 mm bed, glues it, and smooths sharp edges. Use it for display or gentle pretend play.

By hmatostech. CC BY 4.0.

Start with the single chest. A piece of 1.75 mm filament forms the hinge. Optional magnets are unnecessary; leave them out. The older lid has built-in thin supports. Newer lid_no_supports files need support decisions in the slicer. A brim can help the main halves. The lock may need grown-up sanding.

By Spradlinb. CC BY-NC 4.0.

Pick the pipe from the file set. The creator says to print the pipe upside down, without supports, at 0.24–0.4 mm layers. Use it as a pen cup. This set also has brick and question-block cups. Check size before slicing.

By CalebTimoteo. CC BY-NC 4.0.

Choose the empty box, not the game-cartridge insert. Print its snap lid, four question marks, and sixteen rivets. A grown-up glues the details. The creator tested PETG; a PLA version needs a fit check and is our suggested trial, not a tested AD5X result.

By Kanes, remix of steprock. Public domain, as marked by the creator.

Use the STL and your own AD5X profile. The maker’s color order is white, red, black. A grown-up sets color changes at the correct layer heights after checking Preview; do not copy “eight layers” if your layer height differs. One color plus paint is an easier option.

By Gloomsen. CC BY-NC-SA 4.0.

The uploaded goal was enlarged for a cake. Use it as a desk toy here. Scale to fit the AD5X 220 × 220 × 220 mm area with room for any brim. The creator does not give support settings; inspect the crossbar and net in Preview and add supports if needed. Do not use it with food.

By LukaS, remix of Robo. CC BY 4.0.

No supports; the creator used three walls and about 15% infill. They tested ASA and suggest PLA may work. Our starter choice is indoor PLA, checked by a grown-up. Wall screws and secure wall mounting are grown-up jobs. Choose the version you want and follow its mounting notes.

By theGreenOrange. CC BY 4.0.

Paid STL download; check the current price before buying. The creator’s recipe uses five colors: black, yellow, skin tone, white, and blue. The AD5X holds four colors at once. Start in one color and paint, or have a grown-up adapt the design to four colors or plan a manual spool swap. A key ring is separate. This listing was checked through indexed creator-page text; live access was blocked.

By sunbaked3d. Check the purchase license.

Choose GloriousBabyDragon_wL for the normal version with its eyes attached. The wW files add wings; sE means separate eyes. The creator recommends three walls, 10–25% infill, no supports, and a leveled bed. Their optional Z-hop is 0.3–0.5 mm. Check the whole model fits the AD5X bed. Ordinary PLA in one color is our starter choice; the photo uses a special color-shifting filament. A grown-up checks horns and gently frees the joints after cooling.

By EndK7. CC BY-NC-ND 4.0.

Try Flexi_Leaf-Dragon_Medium_Square v2. The May 2026 update fixes fused limb segments in this version. Download the STL and use your AD5X profile. The creator specifies PLA, 0.2 mm layers, 15–20% infill, no supports, and no assembly. Their older printer recipe uses 60 mm/s overall and 20 mm/s outer walls; treat these as model guidance, not a ready-made AD5X profile. Check bed fit and handle its thin details gently. The colorful preview uses special filament.

By 3D_Flexseeds. CC BY-NC-ND 4.0.

The creator offers many lengths. Start with a shorter 5- or 10-segment STL rather than downloading the entire 1.4 GB collection. The photo shows 30 segments. The design prints in place, without supports; the creator tested PLA. Check its curled footprint fits within 220 × 220 mm with room for any brim. Avoid shrinking joint gaps too far. An adult checks sharp details and frees the joints after cooling. The page adds sharing restrictions alongside its listed license; keep the file at its original source.

By kh4rj0. CC BY-SA 4.0 as listed, plus creator’s page notes.

Download Flexi-Rex-improved.stl, the April 2024 version. The creator recommends 0.2 mm layers, three walls for strong links, and 15% infill. Their solid-infill threshold is 8 mm². Use your AD5X PLA profile and inspect the links in Preview. Skip the Prusa MK3 3MF and G-code. Excessive infill can upset its balance. Keep the original size for the first try; a grown-up checks and frees the cooled links gently.

By DrLex, remix of Kirbs and airfish. CC BY-SA 4.0.

Choose a regular v6 model from the Straight or Spiral folder. It prints as one piece, with no assembly; the maker says extra supports are unnecessary. Some files include built-in support. Keep the first print at its original size and inspect the small joints. Skip the HUGE and By Parts folders for now; the HUGE replacement tentacle has different support needs. Ordinary PLA and your AD5X profile are our suggested start. A grown-up loosens the cooled tentacles gently.

By McGybeer. CC BY-NC-SA 4.0.

Try yafic_v2_test.stl first to check the joints, then yafic_v2.stl for the original cube. The rounded files are harder to print. The creator recommends a 0.4 mm nozzle, 0.2 mm layers, at least two walls, and says 10% infill is enough. They recommend full part cooling after the first layer. Use the AD5X PLA profile and inspect hinge clearances. An adult gently works the stiff vertical hinges after cooling; do not force them or put fingers into gaps.

By Austin Vojta. CC BY-SA 4.0.

One STL, Super Flexi Gecko. The creator tested PLA and says it needs no supports. Use the AD5X profile, keep its original scale for the first try, and inspect the fine body and tail in Preview. The creator does not supply detailed layer or infill settings. Their suggestion about PETG was untested, so PLA is the simpler start. After cooling, an adult checks the thin parts and gently frees any stuck sections.

By Martin Rigatoni, remix of WebmasterZero. CC BY-NC-SA 4.0.

Start with Flexi_Holding-Cat_v1.stl, the standard length. The Long file is another option after checking bed fit. The creator specifies PLA, 0.2 mm layers, 15–20% infill, no supports, and no assembly. Print one color first; the preview shows colored details. Bambu and Prusa color 3MFs need an adult to reset the printer profile and repaint for AD5X. Do not send those ready-made profiles directly. Keep thin parts intact and handle gently.

By 3D_Flexseeds. CC BY-NC-ND 4.0.

Download both Inner.stl and Outer.stl, then slice them with your AD5X profile. Print each in one color for an easy two-color result. Keep both at the same scale so they fit together. Original maker Mixaprinter recommends a 0.4 mm nozzle, 0.2 mm layers, PLA, no supports, and no raft. Their listed infill is 50%. An adult checks orientation and clearances in Preview, then tries the fit after cooling. Krakka10 identifies this Printables upload as a re-upload of Mixaprinter’s Thingiverse model.

By Mixaprinter, shared on Printables by Krakka10. CC BY-SA 4.0.

Original creator’s instructions

Choose the single complete 3dbenchy.stl at the end of the Files list. Skip the many multi-part and dual-print files for your first boat. Use the AD5X PLA profile, upright on its flat hull, at its original size. This is also a well-known printer test; its cabin and arches test bridging. Our starting suggestion is 0.2 mm layers without supports. Treat it as a desk boat rather than a floating bath toy. The creator released it into the public domain in February 2025.

By Creative Tools. Public domain, as marked by the creator.

Print Spinning_Top_Body.stl and Spinning_Top_Tip.stl in the supplied orientations. The creator specifies 0.2 mm layers, four walls, 15% gyroid infill, no supports, and a brim for the tip. Use your AD5X profile; ordinary PLA is our starter material choice. After cooling, a grown-up removes the brim and screws the tip into the body by hand. A 12 mm open-end wrench can snug the hexagonal tip; do not overtighten the printed threads. No glue is needed. Our picture is the actual model preview; the creator labels their presentation photos as AI illustrations.

By vmLOGIC. CC BY-SA 4.0.

The file is Gear fidget spinner 3 sizes.3mf, with no separate STL listed. Import its model geometry, select one size that fits, and replace the included printer settings with your AD5X and actual material profile. The creator requires Random seam position for every size and specifies 0.16 mm layers, two walls, and 10% infill. They say the smallest size needs working gently to spin fully; a larger size is our suggested first trial. Check joint gaps and supports in Preview before slicing. A grown-up gently frees the cooled gears. Keep fingers clear of meshing teeth. PLA is our starter material suggestion.

By 3D MAGIC. Standard Digital File License, personal use only; no file or print redistribution.

Download boomerang.stl from this five-wing V2 listing. The page gives no material, layer, infill, support, or throwing instructions. Our first trial is ordinary PLA with the AD5X 0.4 mm nozzle profile and 0.2 mm layers, with the model flat on the plate at its supplied scale. Check bed fit, thin-wing toolpaths, mass, and time in Preview before printing. This trial has not been tested for return flight; the headline’s weight and flight claims are unverified. A grown-up checks edges, demonstrates a gentle throw, and supervises in an open area away from people, pets, and roads. Our picture is the actual model preview.

By SmoothFlow Prints. CC BY-NC-ND 4.0 as listed on the model’s Details page.