Clingy Thingies® are made with a special cling technology. They are not sticky to the touch, yet they stick to any smooth surface and can be easily removed. You can even use water to rinse lint or dirt off the back surface. Clingy Thingies® can be used again and again without leaving any mess or residue. They also feature a write-on/wipe-off surface, perfect for notes, labeling, and reminders.Keep track of your daily and weekly activities with the Home Sweet Classroom Clingy Thingies® Weekly Schedule. The write-on/wipe-off surface makes it easy to jot down your schedule and then quickly wipe it clean for the next week.