hmm... I don't see any 'added value' in the horse-and-carriage rides the city offers. While I'm sure these horses are well looked after, I'm just not that fond of the idea of exploiting animals for our entertainment.
I reckon a horse and carriage ride out on the countryside is all well and good, but I see very little point in such a ride in the center of a city, with - in certain streets - cars zipping by and all that.
I don't mean to be rude or inconsiderate towards people with a disability or an illness - for these people it's a good option to see parts of Leuven, but if you're fit to walk, I see no reason to take these rides.
In any case : from 30 March - 30 June rides are possible during the weekends only, and daily during July-August; always from 13:00-18:00. Tickets are EUR 3 (50% off for children younger than 12) - available from the driver, outside the town hall at the Grote Markt.
Fun Alternatives: If you're able to walk, do it. You'll see a lot more going on foot - at your own pace.
Although Fonske, a statue in the centre of the city, is the symbol of our town and chocolate is a belgian speciality, Fonske chocolates are a new invention an not a tradition at all. They can be bought all over town so they are made in a factory.
Unique Suggestions: Try the brands that made belgian chocolates famous or try one of the stores that produces chocolates themselves. Famous brands are (from cheaper to expensive): Leonidas, Neuhaus and Godiva. I like Neuhaus the best. Also don't think belgians eat these for breakfast, we eat chocolate bouht in the supermarket. You have a wide choice in the supermarkets, Callebout and Cote d'or are moest famous and very good. If you need a souvenir for a kid, or for yourself, buy them a jar of Nutella, it is chocolate paste to smear on bread, they will be eternally gratefull, i promise!
Fun Alternatives: See my shopping tips for where you can buy the best home-made chocolate you will ever have the pleasure of tasting!