I have large poster board paper, it's great for when I'm low on craft activites. Being a large space kids love the idea of having that much more to work with and fill up. They are also wonderful for collage crafts.
I let the kids have a variety of supplies and simply let them decorate to their hearts content. It was their space to fill, and they had a blast. For older children, using these pages have them create their own movie poster. They can be the stars of their own film and be whatever they want. If you have the option, a little creative photoshopping and printing and you can add their picture to the poster too. You're child could then really "be" a superhero or princess, snapping a quick photo while they're in their