I remember this school glue from when I was a little girl. I can not believe that it is still around. It just goes to show you how popular it is! The disappearing purple kind was barely being introduced all those years ago when I was in school and now I even having teaching requesting this one over the regular glue sticks. We even have a pile of these at home that we use for projects. My favorite thing about the glue is that is allows the child to see where they are gluing by remaining purple for several seconds before turning clear. Another top favorite of mine with this glue is that, if you get it on other places on your project that the glue was not intended to get on then its not a big deal because the purple color disappears and you can not even tell it was there previously. They do seem to wear down a lot faster than I would like but I suppose it is not a big deal as they are very inexpensive all year round. This is a must for homes with small kids!