paint which I just spent $$$ on? I would like to put light weight 8x10" decorative alphabet cards in my toddlers' bedroom. Can I do this without ruining the paint job?

yes, go to staples, they have 2 kinds, the first is like silly putty and leaves a small fingerprint sized stain, but if you used flat paint that's super easy to touch up, the second kind is like a, well, kinda like a pen top with a clip on it, but it's square, and flat on the back, and has a more rubbery kind of adhesive, this kind would work best i think, you can also use white colgate toothpaste, we used it in jail to put up pictures, the paste kind, it washes right off with warm water.

Those "pull off" hangers are great. I use them in my art studio. They come it two pieces-1 for the wall,one for the object and velcro together. Find them at walmart,target etc. If you think you need more just add a few for extra weight but I was impressed-I've reused them too.