The love and care we give our children should be for their well-being in this life as well as the next. This is why the moral aspect is very important and should not be neglected. If we really care, then we should make sure that in the narrow window of time that we have, which is early childhood, we do our best to protect our children and immunize them against such moral diseases. This is when the parents need to spend more quality time with their children trying to plant the seeds of goodness in them. Providing a good example is extremely important.
Children learn more by imitating their parents, than merely by being told what is right.
So instead of pressuring them and forcing them to pray, you must set an example and they will follow. If they see you helping the poor and the needy they will be interested to do the same later. If you train them to fast gradually and reward them for their effort they will grow up, ready for Ramadan. It is no good lecturing our children about honesty and telling the truth if we fail to do the same, ourselves. The moral immunization I am talking about is not a quick fix that could be arranged in few days, like the vaccine for Measles or Chicken Pox.