Victoria & Albert's does not permit children under 10 years old to dine.
You could try Bistro de Paris, but it's getting more populated by families. They can get a kids' menu from Chefs de France. Even the signature restaurants are now generally majority families dining, usually on the dining plan. Bistro doesnt' accept the dining plan. You might also try the Swan/Dolphin (Bluezoo, Shula's, Kimonos and Il Mulino are highly recommended) if you are not on the dining plan yourself. The family crowds seem to be cut down a bit at non-dining-plan signature type restaurants.
It's an okay bet (not certain though) that the later your reservation, the fewer families with young children you will find in a restaurant, so try for later dinner reservations if you want things quieter.
Some popular restaurants that do not do characters or games are: Anywhere in Epcot World Showcase except Akershus, the Tusker House buffet and Yak & Yeti at AK, Hollywood Brown Derby or Mama Melrose at DHS, and resort restaurants like the Wave, Turf Club, Sanaa, Kona, Kouzzina, Captain's Grill - there are many.