There are so many completely free things to do in Norwich.
However, there are some activities or venues in Norwich which are not strictly free or "Not quite free" (as labelled), for example you may have to pay for parking, or an 'honesty box', or a charity donation, or there may be an expectation that you buy a drink*.
I'd still like to let you know about those things.
Hope that's OK!
Please do send any feedback to firstname.lastname@example.org
* - I recommend lime soda!