First thing we did when we got to the Christmas market in Gent was to ride the ferris wheel. I think it was the second time in my life to ride one. It's very large and when at the top it's a bit scary. The cabins are moved by the wind so it made feel a little uneasy but overall it was great.
The tickets are five euro and the line is not awfully long. Only my son and I went but you can fit up to six people in one cabin. It's worth it. You get to enjoy spectacular views of Gent.