You won't find them here, there or anywhere. You have to make them yourself because they are engineered to be open source ninjas.
As an unintended consequence of the change in showtimes of the weekly Adafruit Ask an Engineer webcast,
Saturday nights are now free for more making.
Submitted for your approval, is the ninja plush cast of Adafruit Ask an Engineer:
Adabot, ninjabot of Circuit Playground
Ladyada, ninjabot engineer
Phil Torrone, ninjabot
and Becky Stern, ninjabot of Wearable Electronics
And what do they do? Anything. Because they can. Disclaimer: All characters appearing in this work are fabric. Any resemblance to real persons, living or dead, is, well, purely intentional.