Cool/cute/fun/niche stores?

I have a day off tomorrow and wanna check out some more cute/fun shops in the city and surrounding areas! I love places like Fischbergers, Art Smarts Dart Mart, American Science and Surplus, Altered State of Mind, Oniomania, Omen, etc. Just cute or unique stores to browse and explore. Can be anywhere in Milwaukee County, what are your suggestions?