You will need:
Weed killer (Copper sulfate ONLY, nothing else, must be blue)
Zinc metal (Old batteries ect.)
A beaker or cup,
You may need:
Something to HEAT the solution, not boil.
Step 1: Starting Off...
Step 2: Then Add...
Step 3: Just Wait
The reaction should be like the one in the pic.
The zinc is being covered in what appears to look like, "hair"!
That is your copper!
You can heat the solution to speed up your process, that is optional.
Step 4: Final Touches...
Now, filter off the copper from the zinc sulfate,
You now have what you desired!