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 →
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 Gadgets
Engineering 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.