Make Robotics
Accessible & Fun
for Everyone
3D-printed robots, custom controller boards, and design files — crafted by an engineer, tested by kids, loved by makers.
Everything You Need to Build
From printable STL files to ready-to-use controller boards — everything ships from our workshop in Indiana.
3D Print Models
Download STL files for robots like Hexapod, Smarty, and more. Print at home and start building.
4 Products →Controller Boards & PCBs
Hand-soldered ESP32 & Pico controller boards, plus KiCad design files for your own custom boards.
4 Products →Software & Source Code
Arduino firmware, Android apps, and open-source code to bring your robots to life.
4 Products →Featured Products
Hand-crafted robotic kits and components, personally tested before every shipment.
Hexapod Controller PCB Design Files
Hexapod Controller PCB Design Files
3D Printed Custom Gadgets
Need something unique? From personalized room signs to custom desk organizers, we design and 3D-print practical gadgets tailored to your space.
Browse GadgetsEngineering Meets Play
Hi, I’m Zhengyu Peng — an automotive radar engineer at Aptiv by day, robot builder by night. RookiDroid started as a personal project to build 3D-printed robots for my kids.
The controller boards you see here are extras from my own builds — each one hand-soldered and thoroughly tested. What began as a hobby has grown into a workshop where I share designs, code, and hardware with fellow makers around the world.