The hardest part of making these was keeping my children from eating all of the lollipops quicker than I could wrap them up. The second-hardest part of making these was the fact that my three-year-old REALLY wanted to help, and obviously you need to let children participate with Halloween decoration-making, but girlfriend seriously needs to work on her ghost face-drawing skills, just saying.
These ghosts make cute party favors for kids, but you can use them to decorate in lots of fun ways: use string to hang them from light fixtures and such; fill a bowl with them for a centerpiece; line a mirror or mantle with them. (One caveat: if you're hanging them with string, make sure the string is clear, or the effect can be a little too macabre for a kids' party.)