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3D-Printed Accessories for Petoi Bittle & Bittle X Robot Dogs: The Ultimate Guide

Unlock the full potential of your Petoi Bittle and Bittle X robot dogs with this comprehensive guide to 3D-printed accessories. Whether you’re an educator, hobbyist, student, robotics enthusiast, or developer, discover how to personalize, upgrade, and maximize your robot’s capabilities using the latest in DIY robotics, STEM technology, and open-source innovation.

Why 3D-Printed Accessories for Petoi Robots?

3D-printed robot accessories are transforming the way users interact with their programmable robot dogs and cats. Here’s why they matter:

  • Personalization: Give your robot a unique look and new abilities, from animal-themed heads to custom grippers.
  • STEM & Robotics Education: Make learning hands-on and interactive for students, teachers, and hobbyists.
  • Community Collaboration: Access and share open-source designs with a global Petoi community.
  • Easy Access: Download STL files and print at home, through online services, or at local maker spaces.
  • Expand Functionality: Add new features, sensors, and movement options to your robot dog

No 3D printer? You can use online 3D printing services or visit local maker spaces to bring your ideas to life.

Top 3D-Printed Accessories for Petoi Bittle & Bittle X Designed by Petoi

Bittle/Bittle X/Bittle X+Arm Stand


Bittle robot dog sits on a stand

A must-have for anyone assembling, programming, or demonstrating their robot dog. The Bittle stand provides a stable base, making it easier to work on your robot and ensuring accurate calibration.

  • Securely holds your robot during assembly and code testing.  Prevents damage during programming sessions
  • Prevents unwanted movement and accidental falls.
  • Features calibration references for precise setup.
  • Essential for classroom demonstrations and robotics education.

If you don't have access to a 3D printer or 3D printing service, you can buy the Bittle stand from Petoi store.

Bittle Neck Lock

Small neck lock for Bittle/Bittle X robot dogs

Large neck lock for Bittle/Bittle X robot dogs

Bittle's neck is designed to detach when a head-on collision happens. It can prevent irreversible cracking in the structure. However, if you want the joint not to be detached in most cases, you can 3D print one of the neck locks to secure the neck in place.

If you don't have access to a 3D printer or 3D printing service, you can contact us to buy the small neck lock.

Highbar Hook

Take your robot’s movement to the next level. The Highbar Hook lets your Bittle hang and spin from a horizontal pole, supporting advanced movement experiments and robotics club activities.

  • Allows Bittle to hang and spin from a bar for 3D movement.
  • Challenge yourself to program Bittle to maneuver, spin, rotate around the pole, and master advanced programming and spatial logic.
  • Enables investigation of pendulum physics and dynamic systems.
  • Great for robotics clubs and 3D movement demonstrations.

Wide Feet

Wide feet for Petoi robot dog Bittle/Bittle X

Enhance your Bittle's stability and performance on rough terrain. Wide Feet are designed to increase balance and make your robot more versatile in different environments.

  • Increases surface contact area for improved traction.
  • Improves stability and terrain handling for outdoor or uneven surfaces.
  • Increases balance and performance during challenging experiments.
  • Useful for competitions and project-based learning.

Animal-Themed Add-Ons

Petoi Bittle dog is a small smart quadruped robot with a lot of character and distinct features. Don't get us wrong, we love the original form of our AI robot pets.  However, there are many tiny animal accessories that you can 3D-print to give your quadruped a new avatar to keep the fun going.

Beyond mere aesthetics, animal-themed accessories serve important educational and psychological functions in robotics education:

While the main body of the robot will remain the same, these small accessories are easy to put on and will transform your pets into various creatures for you to interact, play, program, and learn with!

Beetle Horn

Replace the dog face with a horn for object-pushing and playful robot battles.  The horn can be used like an arm to push objects and to play friendly battles between Bittles.

As you can see in the video above, the 3D printed Beetle horn is one of the most popular accessories to pair with a Bittle Robot Dog.

  • Adds a unique look and interactive play value.
  • Introduces concepts of biomimicry in engineering design.
  • Supports competitive robotics activities and challenges.  The competition can be a Sumo-style game match each Bittle is trying to push others out of the circle.
  • Introduce a fantastic way to learn and explore Petoi Bittle movement, spatial awareness, and robot mechanics!
  • Great for creative classroom activities and competitions.

Fox head

Swap the head for a fox design to give your robot a new character.

  • Inspires storytelling and imaginative play.
  • Design and program some new fox moves.
  • Easy to install and remove for quick customization.
Fox head for Petoi robot dog Bittle/Bittle X

Bone for Petoi Bittle dog

Bone for Petoi robot dog Bittle/Bittle X

Every dog loves to clamp a bone in its mouth.  So does Bittle robot dog. 

Print a bone for Bittle to “hold” in its mouth for playful interactions.

  • Perfect for photos, demos, and engaging students.
  • Quick introduction to 3D modeling and printing for beginners
  • A simple accessory that adds charm to your robot dog.

Community Innovations and Open Source Excellence

The Petoi community represents a thriving ecosystem of educators, students, and professional developers contributing to the advancement of educational robotics. This collaborative approach has produced numerous innovative accessories:

Lego Cover

Lego cover for Petoi robot dog Bittle/Bittle X

Transform your smart Bittle robot family into a creative platform for DIY STEM projects. The Lego-compatible cover replaces the standard back cover, allowing you to attach Lego bricks and build custom structures.

  • Enables attachment of Lego bricks for custom builds and cargo boxes.
  • Encourages creativity and hands-on learning in STEM projects for kids and adults by encouraging anyone to new capabilities.
  • Ideal for design challenges, school projects, and playful experimentation.

Bittle Electronics Cover by Carl Clement

This sophisticated protective solution, designed by community member Carl Clement, demonstrates the power of user-driven innovation:

  • Professional-grade protection for sensitive electronic components
  • Easy access for maintenance and upgrades
  • Weather resistance for outdoor educational activities
  • Clean aesthetic that maintains the robot's professional appearance

His idea was to create a prototype that could fit snugly on top of Petoi Bittle.

Petoi programmable robot 3D printed accessories

Cat Head by Don Patrick

If you're looking for a programmable robot cat, Petoi Nybble is a great choice! However, if you're looking to retrofit your Bittle DIY robot kit, this accessory by Don Patrick transforms your robot dog into a functional robot cat with sensing capabilities.

Features:

  • Hollow eyes accommodate an ultrasonic distance sensor
  • Servo-powered rotatable head for enhanced interaction

Benefits:

  • Enables distance sensing and autonomous navigation experiments
  • Perfect for AI projects and interactive programming
  • Compatible with both SG90 hobby servos and Petoi servos
  • Easy wire management with built-in gaps and accessible sensor connections

This robot cat head accessory combines aesthetics with functionality, making it ideal for both educational robotics and creative play.

Bittle robot dog with a cat head

Bittle Dino the Dog - Triceratops Head & Tail by Michael W

One of the most impressive community creations comes from Michael W (AllentheBear on Thingiverse), who has created an incredible dinosaur transformation for the Petoi Bittle that's perfectly timed with the release of Jurassic World Rebirth.

Features:

  • Dino triceratops head fits the existing servo
  • Clip-on tail anchors to the rear bar—no extra hardware
  • Counterweight tail design maintains balance

Benefits:

  • Preserves full servo rotation
  • Simple snap-on installation
  • Demonstrates mechanical design and balance principles
  • Inspires STEM learning through creative 3D modeling
Michael designed a 3D-printed dinosaur head and tail for Btitle.  He believes Bittle is the perfect customizable robot of the future.
If you don't have access to a 3D printer, you can order the parts from Michael's shop.

Frequently Asked Questions

Question: Do I need a 3D printer to use these accessories?

Answer: No. Multiple options exist, including:

  • Online 3D printing services like Shapeways or Printables
  • Local maker spaces and libraries with 3D printing facilities
  • Educational institution partnerships for shared resources
  • Community workshops and fab labs

Question:  Are accessories compatible with both Bittle and Bittle X?

Answer: Yes, the open-source design philosophy ensures broad compatibility across Petoi platforms. Most accessories work seamlessly with both models, though some advanced features may require specific hardware configurations.

Question: Where can I find STL files and design resources?

Answer: All the STL files an resources can be found on the external links we share in each accessory section.

Question: Can students design their own accessories?

Absolutely! Original design development is a core educational objective:

  • Students can use CAD software like Tinkercad, Fusion 360, or Blender
  • Collaborative design projects encourage peer learning
  • Contributing to the global robotics community builds professional skills
  • Design thinking methodologies support systematic problem-solving

Question:  What materials are recommended for educational environments?

Material selection depends on application and safety requirements:

  • PLA (Polylactic Acid): Ideal for most educational applications due to safety and ease of use
  • PETG: Excellent balance of strength and flexibility
  • ABS: Better for parts requiring durability and heat resistance

Recap

3D-printed accessories for Petoi Bittle and Bittle X represent more than simple robot modifications—they embody a comprehensive educational approach that bridges creativity, technology, and hands-on learning. This guide demonstrates how the convergence of educational robotics, 3D printing technology, and open-source collaboration creates hands-on experiences that prepare students and folks for success in an increasingly automated world

Give your quadruped robot a new personality or function with these fun, 3D-printed accessories.  They will excite anyone, particularly kids, to assemble and build new forms of robots.

Curious about creating your own 3D-printed robots?

Petoi provides everything you need—from hardware to software—to bring your quadruped robot projects to life. Get started building today!

3d print opencat nybble robot cat
Which one of these accessories would you like to 3D print first?  Have you designed some new 3D-printed accessories?  Share them with the world!  Let us know by leaving a comment.

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