These pens are pilot frixion gel pens. You can erase them. And they don't leave erase dust behind, plus they erase away completely. They come in markers, pens, and highlighters. You have to use special erasers but they are amazing!"
$1.63 (Buy here: https://alitems.com/g/1e8d114494ebda23ff8b16525dc3e8/?i=5&ulp=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2F5-pcs-lot-6-colors-in-1-pen-Cute-Kawaii-Watercolor-Gel-Pen-Water-Chalk-Pen%2F32390902503.html ) 5 pcs/lot 6 colors in 1 pen Cute Kawaii Watercolor Gel Pen Water Chalk Pen for Black Board Scrapbooking Photo Free shipping 534 for just $1.63