I heard a tip to make laundry a little easier: buy each member of your family three laundry bags - one for whites, one for lights and one for darks. If possible, purchase a different color for each person. You could even get a light blue bag for lights, and dark blue bag for darks, and a white one for whites and tie a blue (color-safe) ribbon to it. Ok - I know I may be getting obsessive here!!
Train your children how to differentiate between light and dark colors - a great learning tool even for toddlers!
When it's time for a load of light-colored laundry, ask your child to bring you his light bag. Since it will probably not be full, tie up the bag and wash the entire bag. If the bag is not too full, you could toss it in the drier and save all the sorting! And since the bag is color-coded, you know who it belongs to!