When planning a wedding, some of the guests you have to keep in mind that tend to demand a good bit of attention are kids, of all ages. Usually they require special meals, special seating, and of course something to keep them busy so that they do not crash into your cake, do cartwheels on the dancefloor, spill a drink all over the floor or become a 30 minute crying “serenade”.
If your venue can spare it, and your pocket can afford it, have some space set up for children to keep them busy, preferably in an adjacent room. The simplest of things such as coloring books, easy board games, or even a TV set with a popular movie can keep a child busy for some time and interacting with other children in their age group. Obviously you do not want them completely excluded from your reception, but once the dinner portion is over, it will give them something to do if they do not want to hang out with the grown ups or be confined to a seat. At least they will have the option to not stay in the same room for the whole time. The most important part not to forget: you HAVE to have someone in that room to supervise. Preferably not a guest so that they do not feel left out of the ceremonies, but someone with babysitting or nanny experience is always recommended.
Speak with your caterer. Sometimes, if you are having a buffet for dinner, they can create a custom child friendly buffet for them so they have food that most children like to choose from and remain happy during their meal.
When planning all of this out, keep in mind the parents of these children. If they are the type of parents that want to have an eye on their children at all times, then a seat next to them is always the perfect place for their child, no matter what. However, if some parents are more comfortable with letting their children go and do their own activities for a few hours, they will be glad that to have some usually much needed one on one time with their spouse, even if it is just for a few dances and some socializing.
It is hard to please everyone, but that last thing you want to happen is some part of your day be ruined from a misbehaving child. The crying tantrums and unruly behavior are the two things to try to avoid, so always look for ideas to help and do not always assume that everything will be great. As the saying goes, plan for the worst and hope for the best.