Pilot® FriXion® Erasable Ink Pen Refills, Fine Point, 0.7mm, Assorted Inks, Pack Of 3

We initially got the pens that go with these refills for a long car trip. We appreciate that these pens erase, which is much less frustrating for kids when doing a reverse coloring book or other activity book in the car. It turns out that we like them so much, however, that we used up our regular pens and started using these almost exclusively. I had no idea that they were refillable until my daughter said something-- and now I'm even happier with that initial purchase! I would much rather refill a pen and save just a tiny bit more plastic from entering the ocean. Refills were easy enough to put in that my 7-year-old took care of the job. All of them wrote smoothly. There are not refills for the large set of colors we originally purchased, but I'd rather have some refills than none at all. We will definitely purchase these again.

These are used for school. This was the best deal that I could find online. Love the frixion erasable pens and that they can be refilled!