10Pcs Series or Parallel D Battery Holder Kit, Perfect for Physics Laboratory, School Electronic Experimenting, Great for Demos Teaching Basic Principles of Electricity

Swpeet 10Pcs Series or Parallel D Battery Holder Kit, Perfect for Physics Laboratory, School Electronic Experimenting, Great for Demos Teaching Basic Principles of Electricity

10pcs Single Knife Switch:Used for Physics Laboratory,School Electronic Experimenting,Great for Demos Teaching Basic Principles of Electricity & How a Simple Circuit Works

30PCS Premium Alligator Clips Electrical, 5 Colors Test Leads Cable with Crocodile Clips, Dual Ended Jumper Wires with Power Test Probe for Electric Welding Testing Experiments, Circuit Connection