Managing children at a wedding is not an easy task. Usually they are all different ages, could be from different families and then you could add in behaviors, etc. Their parents that are attending want to have a good time, and not have to worry about their kids having fun or needing them.
It is a difficult decision to decide if you should allow children at your reception or not. If you do decide to allow children at your reception try to make sure that they have a little something to keep them busy.
On a personal note I would not give them lots of candy (it hypes them up), provide more activities to keep them busy. Here are some cute photos of tables for kids that we found!