A.C.
As a teacher I used a product called Wikki Sticks (which appear to be the same thing) and they were terrific. We used them to work on some art skills, but we mostly used them as a way for the kids to "create" their spelling words on their desks (something the tactile learners really seemed to benefit from). Mine held up and worked well for several years, though after a bit of handling the color did start to look a bit dirty. They were not at all sticky and did a pretty good job of holding their shape.