Life can be quite tragic. But you must make sure that you spend enough time with the children, so that they know that you are there for them. Play with them and make them laugh. They should have plenty of toys and books to play with and read.
Food should be made palatable. Avoid spices, especially chillies. They should eat at least 4 or 5 times a day. Their preferences can be taken into account. They should not be forced to eat something, but persuaded to eat everything gradually. Talk to your parents and ask them how you can share in the rearing of the children.