{"data":{"contests":[{"id":"504","slug":"hp-robots-otto-remix","name":"HP Robots Otto: Remix Challenge","teaserImageFilePath":"media/competition/teaser_images/504/small_banner_otta.jpg","description":"### First place:\r\n* [Prusa CORE One+ kit](https://www.prusa3d.com/product/prusa-core-one-kit),\r\n* [HP Robots Starter Creator Kit + All Creator Expansions](https://shop.moravia.education/educational-and-interactive-robots/hp-robots/hprobots-bundle-start-exp4-b-1.html). \r\n\r\n### Second place:\r\n* [HP Robots Starter Creator Kit + All Creator Expansions](https://shop.moravia.education/educational-and-interactive-robots/hp-robots/hprobots-bundle-start-exp4-b-1.html), \r\n* 2000 Prusameters.\r\n\r\n### Third place:\r\n* [HP Robots starter creator kit ](https://shop.moravia.education/educational-and-interactive-robots/hp-robots/hp-robots-otto-creator-kit.html),\r\n* 1200 Prusameters.\r\n\r\n### **\ud83c\udfc1 Starting: March 05, 2026, Ending: April 05, 2026 23:59 UTC.**\r\n\r\n### **\ud83d\udcc5 Entries: from March 01, 2026 to April 05, 2026 23:59 UTC.**\r\n
\r\nAre you into robotics, 3D printing, and playful design? **Robot Otto is ready for your remix!**\r\n\r\n\r\n## About Otto\r\nOtto started as an open-source robot project that helps people learn by building, coding, and creating. Over time, it has grown into the modular [HP Robots platform](https://hprobots.com/) that supports accessories, add-ons, and custom upgrades. And that makes Otto a great fit for remixing on Printables!\r\n## Challenge\r\nDesign a 3D printable remix for Otto that changes how it looks, works, or what it can do. You can make a practical upgrade, a themed character, a fun accessory, or a new module. We\u2019re looking for original ideas that give Otto a new style, personality, or purpose.\r\n\r\n### Here are a few ways to get started:\r\n* **Accessories** - new tools, attachments, modules, or expansions.\r\n* **Characters** - turn Otto into a themed design or give it a new personality.\r\n* **Devices** - build something new using Otto\u2019s parts, features, or system.\r\n
\r\n\r\nFor inspiration, you can also explore [Otto\u2019s Printables profile](https://www.printables.com/@hprobots), which features more than 60 models!\r\n\r\n## Don\u2019t have the kit?\r\nThat\u2019s totally fine. No purchase is necessary to participate. You can design your entry using the provided files:\r\n\r\n* [STEP files, blueprints, and dimensions of all HP Robots Otto electronic components](https://www.printables.com/model/829419-hp-robots-otto-starter ).\r\n\r\n* [STL files of current kits and new remixes](https://www.printables.com/@hprobots/collections/24346).\r\n\r\nWe recommend using the [Maker Empire 3D modelling app](https://www.makersempire.com/3d-print-custom-otto-robot-makers-empire/), where you can easily use them.\r\n\r\n\r\n### Special deal\r\nFor anyone who wants to try out their ideas in real life, HP Robots is also offering a special deal for contest participants!\r\n\r\nYou can purchase HP Robots kits (Starter Creator kit and all Expansion Creator kits) at a special price directly via their official [CZ](https://vyuka-vzdelavani.cz/interaktivni-roboti/manufacturer/hp_robots.html), [EU](https://shop.moravia.education/educational-and-interactive-robots/hp-robots.html), or [US](https://shop.moravia.education/us/hp-robots/manufacturer/hp_robots.html) e-shop:\r\n\r\n* EU participants: 25% off the regular EUR price (incl. VAT) + free shipping. \r\nUse discount code **CONTEST** at checkout.\r\n\r\n* Non-EU participants: 30% off the regular USD (excl. VAT) + standard shipping.\r\nUse discount code **CONTESTUS** at checkout.\r\n\r\n## Want to code your Otto?\r\nIf your design involves programming, you can start with the [HP Robots web blocks platform](https://hprobots.com/otto-robot/code/). Advanced users can also use any ESP32-compatible coding platform, including Thonny IDE for MicroPython or the Arduino IDE.","isOpen":true,"openFrom":"2026-03-05T14:30:11+00:00","openTo":"2026-04-05T22:59:00+00:00","modelsCount":47,"winnerPrize":"","entryLink":"https://www.printables.com/contest/504","winnersLink":"","printDateValidation":"2026-03-01T00:00:00+00:00","signedModelsCount":0,"maxModelsPerUser":5,"aiGeneratedPrintsDisabled":true,"__typename":"CompetitionType"},{"id":"506","slug":"sensory-play","name":"Sensory Play","teaserImageFilePath":"media/competition/teaser_images/None/zaklad.jpg","description":"### **\ud83c\udfc1 Starting: March 06, 2026, Ending: March 22, 2026 23:59 UTC.**\r\n\r\n### **\ud83d\udcc5 Entries: from February 01, 2026 to March 22, 2026 23:59 UTC.**\r\n
\r\nSensory play is all about exploring textures, shapes, and patterns - with plenty of squishing, rolling, and stamping. The kind of stuff that keeps toddlers\u2019 hands busy and their brains happy. \r\n\r\nWe\u2019ve just published a [helpful article](https://blog.prusa3d.com/diy-sensory-play-3d-print-your-own-accessories-and-let-the-kids-play_122514/) on our blog about DIY sensory play. It covers simple stamps, rollers, and molds for playdough or kinetic sand, and shows how you can easily remix designs directly in [PrusaSlicer](https://prusaslicer.net/). Now it\u2019s your turn: design your own sensory play tool or toy and share it on Printables! You\u2019re not limited to the examples in the article, if it fits the sensory play theme, it\u2019s welcome.\r\n\r\n### Safety note\r\nThese prints aren\u2019t certified toys, so supervision matters. Avoid sharp edges and small parts, and clean prints with warm water and dish soap (no dishwasher).\r\n
\r\n### \ud83d\udcf8\u2b50 Hero model of this contest: [Sensory play molds with stamps](https://www.printables.com/model/1424924-sensory-play-molds-with-stamps-mechanical-hinge)","isOpen":true,"openFrom":"2026-03-06T13:19:49+00:00","openTo":"2026-03-22T22:59:00+00:00","modelsCount":132,"winnerPrize":"500 Prusameters which are more than enough for one Prusament spool. The winner will also receive the Printables honorary badge, and up to 900 Prusameters will be distributed among other top entries.","entryLink":"","winnersLink":"","printDateValidation":"2026-02-01T00:00:00+00:00","signedModelsCount":0,"maxModelsPerUser":5,"aiGeneratedPrintsDisabled":true,"__typename":"CompetitionType"},{"id":"505","slug":"flexit","name":"Flex It! (TPU Edition)","teaserImageFilePath":"media/competition/teaser_images/505/small_banner_tpu.jpg","description":"### **\ud83c\udfc1 Starting: February 20, 2026, Ending: March 08, 2026 23:59 UTC.**\r\n\r\n### **\ud83d\udcc5 Entries: from January 01, 2026 to March 08, 2026 23:59 UTC.**\r\n
\r\n\r\nThis flash contest is all about models where FILAMENT FLEXIBILITY is the main character. Submit a design whose function depends on elasticity, impact absorption, or grip. For [Prusament TPU](https://www.prusa3d.com/category/prusament-tpu/) printing tips, you can start on our last year\u2019s [blog post](https://blog.prusa3d.com/prusament-tpu-95a-now-thats-a-flex_115316/) and then create something where TPU is the best choice: vibration damping feet for devices, shock absorbers, corner and edge protectors, resistant cases, non-slip sleeves for handles, or something playful like custom RC tires - anything that shows the flexi material doing its work. Try not to submit decorative stuff (unless it actually shows off the flex \ud83d\udcaa). And for safety reasons please don\u2019t submit items intended for babies or small kids that could end up in their mouth. Also, as always, keep it food-safe: no ice trays, or food molds or anything meant to touch food or drinks.\r\n
\r\n### \ud83d\udcf8\u2b50 Hero model of this contest: [Skate blade cover](https://www.printables.com/model/1311557-skate-blade-cover)","isOpen":true,"openFrom":"2026-02-20T08:39:18+00:00","openTo":"2026-03-08T22:59:00+00:00","modelsCount":756,"winnerPrize":"500 Prusameters which are more than enough for one Prusament spool. The winner will also receive the Printables honorary badge, and up to 900 Prusameters will be distributed among other top entries.","entryLink":"","winnersLink":"","printDateValidation":"2026-01-01T00:00:00+00:00","signedModelsCount":0,"maxModelsPerUser":5,"aiGeneratedPrintsDisabled":true,"__typename":"CompetitionType"}]}}

Lego Compatible (68013.dat) Cylinder Half 1 x 2 with Cutout

Summary

Model origin

License