Here’s the parts list with links to sources.

Parts:

• Foam Board (approx. 8.5″ x 11″)
• (2) Yellow 1:120 Gearboxes with 6V Motors plus Wheels
• (4) 0.1uF Capacitors
• 4xAA Battery Box with Switch
• 400 Point Solderless Breadboard
• Ping Pong Ball
• L9110S Dual Motor Driver
• IR Remote Control Package (Remote + Receiver Module + IR LED)
• Arduino Nano (the latest version with the CH340G is recommended)
• 1K Resistor
• (9) 20cm Male-Female Jumper Wires
• (6) 10cm Male-Male Jumper Wires
• Double sided tape (3M VHB or similar)
• Wire

• Pin Headers
• Heat Shrink Tubing

-or-

• Male Crimp Pins
• Crimp Pin Housing

Tools:

• Soldering Iron
• Solder
• Solder Wick
• Wire Strippers
• Wire Cutters
• Small Screwdriver
• Needle Nose Pliers
• Small File
• Ruler
• Pin Crimper Tool
• Heat Gun
• Small Vise
• Multimeter