The polyethylene film or the film with paper on top will stay on wall for days, weeks, and even months. When you no longer want it – just pull it off to remove. If you want it for longer – just roll some more charge on it. Great for quick decorating needs - a party or an event. Young children, who just start their artistic careers, will be very proud seeing their artwork being displayed all around the house. It boosts self esteem and aids to create desire to draw or color more. Tweens would be delighted to decorate and redecorate their rooms with posters and pictures as often as they want. More ideas see here.