Bursa has amazing bazaars which can fascinate for days. However unless you speak Turkish it's difficult buying anything complex, like shoes etc.
There is also the cable car, Bursa Telerifik, which is very enjoyable in the summer. Families go up to the cooler mountains for hiking and picnics. It's very pretty.
Wonderful city-so much history-a visit to the old village is a must-the big tree and waterfall area are great too