After eating, have them wash the dishes with their brothers and sisters, let them fold laundry or cook with you, pull weeds or mow the lawn. You are not doing this because you are poor and can't afford help. You are doing this because you love them and want them to understand certain things about life.
Children need to learn to appreciate the amount of effort it takes to do a job right. They need to experience the difficulties in life that people must overcome to be successful and they must learn about failure to be able to succeed.
Children must also learn how to work and play with others and that they will not always win, but they can always work harder to reach their goals. If they've done their best, then they can take pride in all the effort they put forth.
Life is about giving and serving and these qualities are taught in our homes.