2-5/8" plastic Red wheel Futaba servo hub

3-Pin Female JST PH-Style Cable (30 cm) with Male Pins for 0.1" Housings

3-Pin Female JST PH-Style Cable (30 cm) with Female Pins for 0.1" Housings

Vibration motor with a diameter of 8 mm and a height of 3.4 mm. It has a self-adhesive 3M backing for easy installation. Pololu 1637

Vibration motor with a diameter of 10 mm and a height of 3.4 mm. It has a self-adhesive 3M backing for easy installation. Pololu 1636

Vibration motor with a diameter of 10 mm and a height of 2 mm. It has a self-adhesive 3M backing for easy installation. Pololu 1638

The Step-Down D24V3AHV Buck Voltage Regulator module with adjustable output voltage in the range of 4-25V with a wide input voltage range of 4.5-42V and a maximum output current of 300 mA. Pololu 2102

Rechargeable NiMH Battery Pack: 7.2 V, 900 mAh, 3x2 AAA Cells, JR Connector

Rechargeable NiMH Battery Pack: 7.2 V, 350 mAh, 3x2 2/3-AAA Cells, JR Connector

Solarbotics RM2 (high-power motor for GM2/3/8/9)

Solarbotics GMB28 (GM2/GM8 Gear Motor Bracket, Laser-Cut Steel)

Machine Screw: M3, 25mm Length, Phillips (25-pack)