Small business Ideas?

Okay, so I'm not looking for a summer job or anything. My friend started a little busines, which she advertises on facebook, on which she sells hair bow accessories made of duct tape. it's just a small business where you can order cute handmade duct tape bows from her. I want to do something similar, but I don't want to copy her. I just think having a little business of my own would be fun, and the little extra cash i'd get, wouldn't be bad either. P.S. I'm not trying to compete with her, she REALLY is a good friend of mine.... i just have free time on my hands and I thought it would be fun.... any suggestions??