Zonon 84 Pcs Large Set Kids Magic Pens for Grooved Handwriting Practice 12 Disappearing Ink Pens with 20 Refills 12 Pencil Grips, Reusable Invisible Pen for Magic Copybook Grooved Writing Book Kid 3-5

These refills work as well as the ink that came with the pens that came with the grooved practice books. The kids love the disappearing ink! Best price I found! Easy to use.

They work great!

Got these for my grandson and he really loves him. He’s actually learning to write very well. He’s only three.

This product does write easily, the ink does dry and disappears quickly, it’s easy to use with the finger grippers. It has helped my 3 year old start to write in her practice workbooks

Perfect for Kids learning to write.

These are not as good as it sounds. The capabilities are of these pens aren't actually misrepresented I just expected them to perform a lot better. I wish the description would have been more honest about how well they actually work. First of all, there's a special spacer on the end of the ink cartridges that prevents you from putting these in regular pen cases. The pen casings these come with are awful and the hand guide does NOT remedy the situation satisfactorily. Secondly, the ink does indeed fade and disappear. It takes roughly 30 seconds for it to begin fading, after 5 minutes it's mostly faded away. The ink does indeed fade away completely to the point you can't see it at all if you wait long enough but it takes nearly 24 hours. I wish the ink stayed visible for 10 or so minutes but it fades a little too quickly. But it's important to note that the ink actually does indeed fade completely away. I think erasable pens are a little better than these overall.

I like that the pens are wrapped individually with some refills. I didn't buy them for this but it would be great to give as favors or gifts.

My granddaughters love these. They work on all paper surfaces and not just specialty books. I also love the holders that help with hand placement. These are perfect for kids that are preschool/elementary level that are just learning to write.