its is a temporary magnet.
Step 1: Things You'll Need:
1. iron bar
2. copper wire
3. battery 1.5v-2v
4. electrical tape
Step 2: Coil the Wire Around Iron Bar.
leave ends to attach to battery.
Step 3: Now Attach It to the Battery.
make sure that electricity is flowing.
Step 4: Now Try Picking Up Nails.
Step 5: Now Tape the Ends Attached to the Battery.
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Please be positive and constructive.