From Alex Glow at Hackster:

A furry companion robot that can purr? For me, a roboticist who can’t have pets, my newest bot will make the winter months so much more cozy! I’ve designed this module in KiCad to provide a soothing purring interaction, complementing my Companion Core. It runs on 5V and can power two or four haptic vibration motors.

Plus, it has a neat bee design! Buzz buzz. 🐝