Each group needs:

• 1 6-V Zn-C battery (US$1.30)
• 1 compass (diameter 16 mm; US$1.00)
• 1 75-cm length wire
• 1 6.2 V, 0.5 A incandescent light bulb (US$1.30)
• 1 light bulb receptacle (US$1.98)
• 10 staples
• 1 iron/steel nail or other long cylindrical object
• 1 pencil or other long cylindrical wooden object
• other student requested objects that are available in the classroom