| Part image | Part | Quantity per bot | Comments |
|---|---|---|---|
 |
9V Lead with barrel jack | 1 | Make sure you get leads with a barrel jack |
 |
9V battery | 1 | Sometimes kids go through more than a single battery in a single session |
 |
ULN2003 Stepper motor driver board | 2 | Needs to be this exact board as the body is designed for it |
 |
28YBJ-48 Stepper motor | 2 | |
 |
Male to female dupont jumper cable | 20 | |
 |
Wemos D1 R2 (v2.1.0) | 1 | |
 |
I2C 128x64 0.96" OLED screen | 1 | 4 pins (GND, VCC, SCL, SDA) |
 |
Micro USB cable | 1 | Observed about a 5% failure rate in the cheap one we buy |