I need a really small crochet/knit project that i can sell, but easy and perfect?

Me and my friend are having a small sale to sell stuff, and we are making homemade things to sell in her neighborhood. She has mostly elderly peaple there and I like to knit and crochet small things. So far, all i crochet/ knitted were: a water bottle holder, a MP3 case, a recycled plastic bag from publix wallet, and a dishcloth. Anything else?