Christchurch was a massive city back in 2010, but in 2011 it was struck by a massive earthquake, so although it's still a relatively large city in NZ it is still recovering. There was so much construction work going on around the city, and some buildings didn't even look like they had been touched since the earthquake. We went for a bit of a walk, but in all honesty there wasn't that much to see. We went to a shopping area which had stores in containers which was pretty cool, and then we went for a walk around the botanical gardens which were pretty, but that was basically it.
The rest of the afternoon we were sorting out how to get to and from our next stop. The next stop was Kaikoura, which was on our top list to visit as it is where you could do whale watching and dolphin swimming. The issue was we had to be back in Christchurch the following day to catch a flight which made things complicated if we were going to get the kiwi experience bus. In the end we decided the next day we would hire a car and drive ourselves to and from Kaikoura.