I bought me thick pens for solving a physics problem

It seems like that this store sell whatever people want. In this day, I drop by this store for searching for a valuable item that I'm going to use.

So, what I found was think pens for use.

I bought me thick pencils for solving a physics problem. In fact, I have a few thin pens but I think this is going to work. I faltered a set of color pens and a set of black pens and made a decision to buy me a set of black pen ;)

Moreover, I saw his item. There are lots of magnets and it made me come up with electromagnetism.

From normal magnet to horse magnet, there are an array of magnets in the store and there is no doubt that many items are useful for science.