The colorful frames shown below came from Michael's craft store. They were originally $1, marked 70% off, for a final price of 30 cents each. :)
|ignore the brown one|
I spray painted the frames black and put in black-and-white print papers. The plan is to cut bat silhouettes for each one. In the meantime, I used some bat stickers I had on hand to give me an idea of what they will look like.
The larger frame below was already black - no spray paint required. It was $10. Not quite the 30-cent bargain, but not too bad. :)