Rechargeable NiMH Battery Pack: 4.8 V, 900 mAh, 4x1 AAA Cells, JR Connector

Rechargeable NiMH Battery Pack: 4.8 V, 350 mAh, 4x1 2/3-AAA Cells, JR Connector

Injection-Molded Sprocket Set 8T GM

Solarbotics SW-B BLACK Servo Wheel with Encoder Stripes, Silicone Tire

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

Injection-Molded Sprocket Set 8T Futaba

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

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

Mini digital servo with metal gear. It has a range of motion of 145°. Pololu 1047

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