All I have to say is "How fun are the 3rd party sites?"
I could have spent days (and surely will in the future) adding, changing, editing, and trying all the different options that the "Big Huge Labs" site had. I simply uploaded a picture that I had (on Facebook) and starting playing. It really is playing - I had so much fun trying everything (I do mean everything).
This site could be used in so many ways. One way students could use this is to create a poster or magazine cover for a specific image. It would envoke creative writing and artistic abilities.