Peel the backing from the sticky-back plastic, working from the top down. Stick the plastic to whatever surface you want to use, sticky side out. The great thing about this is is can be used on so many surfaces - cupboard doors, radiators (when off obviously!), house doors. I set mine up on our patio doors as I love the effect it created having the light shining in behind the pictures. I set up a piece for each H and J so there wouldn't be any arguments.
Unfortunately my idea of a beautiful flower scene didn't exactly play out and I soon learnt the children were enjoying the stars much more than the petals. A quick dig around in the craft box I have revealed foam stickers, buttons and pom poms so I passed those out and the kids went mad!
H was in her absolute element and if I'd had enough materials to last she would have stayed there all day. J spent about half an hour sticking, but eventually had enough and moved on. I can say though, that whilst I've been able to sit back during other activities, I've usually had to interact a little to show them what to do. With this activity I could sit back and have a cup of tea, totally at ease and they were completely engrossed.
All in all this took me about five minutes collecting and gathering and five minutes to stick it all down. And I love the result too, in fact I kept it up for a couple of days it was so pretty. The only problem was getting decent photos, due to the light behind it, so apologies for that!