My Wife & I were in St Louis over the holidays , we took the time to check out the "City Museum" . Really not a museum at all , more of a art inspired Habitrail for children as well as adults .
Something like this would be a great fit in Detroit , plenty of vacant buildings & I would assume not terribly expensive to build . They use plenty of scrap, reclaimed architectural artifacts , wood & metal . Kind of like a Tim Burton McDonalds play place ....

Check it out if you're out that way, Great use of a vacant shoe factory , the museum , lofts & artist's studio's all inside , a truly unique space .

http://www.citymuseum.org/site/