If you're having kids at your wedding - older than the infant/toddler stage - you should think about providing some activities to keep them busy.
I'm not suggesting that you hire a magician or face painter but you may want to buy some coloring books and colored pencils (markers may run and stain hands and clothes) so that while they're at the reception they are occupied.
While parents may take their kids for a spin on the dance floor, they will need something to keep their littles ones busy when everyone is eating or listening to toasts. Coloring books are inexpensive and popular with boys and girls in a wide age range.
Trust me. They'll thank you for this thoughtful gesture.