Now I am going to show you how to see the inisible lines called magnetic field. It is very easy so let's get started.
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Step 1: Step 1 : Materials
You are going to need : 3 pieces of clear plastic
some drill bits
some bolts and nuts
and some pushpin tips
Step 2: Step 2 : Making
Take one piece of plastic and mark where you want holes. Than drill them and clean the edges.
Finally screw all three pieces together but do not forget to put the tips of pushpins !
And you are done ... Enjoy !