Students work together to fill in the bubbles while you circulate and assist. Once the students are finished, post their comic strips to allow their classmates to compare with the other versions. You may then want to give them the original for class discussion. These postcards advertise merchandise and services. You could bring in multiple copies of 5-10 different postcards and have pairs each select a few of them.
Pairs can then answer a series of questions.
You could also try using bills, flyers, classifieds, pictures of signs, recipes, CD inserts or club ads with low-level classes. Just make sure that you provide enough structure by giving specific tasks. Otherwise, you'll run the risk of frustrated students staring blankly at an overwhelming array of information.