Discreet?

So I'm 20, and live with my parents. I'm a full time college student, and work part time plus I babysit for family regularly. I want to get a toy to help relieve stress, and to explore myself a little, but I don't have time to go out and shop when stores are open, and if I order something it has to be from somewhere that my parents won't know what it is. Any suggestions on where I could buy something that my parents wouldn't be able to know what I bought?