Maxwell’s Cradle -Tools Required

Posidrive Screwdriver (+)
Fine sandpaper or emery cloth
Sharp Knife
Soldering iron
Solder
Electronic Cutters
Ruler or Vernier

12v Power supply able to give at least 2A

A smaller supply can be used if you add an additional large storage capacitor of 2200uF or so, but it will depend on the power supply.