Find out if there's a tour around University of Dar es Salaam, a well-known educational facility in the area. Look on as the energetic students run to and from lectures.
If you like hearing the word "free" as much as most do, you'll be happy to know this modern university is precisely that. University of Dar es Salaam is located in Ubungo. To keep your sightseeing schedule full while you're in the area, also stop by Kariakoo Market, Zanzibar Ferry Terminal and Mlimani City.