The project didn't end up being quite as simple to do as we first thought, (Painting lines on walls is a challenge, the stamps liked to smear...) but we had fun. It isn't perfect (which you can tell in the picture) but it looks nice and makes the room look more decorated and not so plain.
Stamped borders are really quite cheap to do as they simply take stamps (we used a Stampin' up set that we borrowed from my sister) and acrylic paints that you can buy very inexpensively at places like Walmart. This project took several hours to do (with several women working ) but some designs and stamps will go much faster. I think the sponge stamps actually stamp on walls much better then the more expensive rubber stamps. (You can see pictures of the time I did stamping on the walls using sponge stamps here.)
Have you ever stamped on walls? What are your thoughts on it?