For children that demonstrate care towards others, they must be taught to take care of themselves
The final of the four Truths of the Noble Ones taught by the Lord Buddha was the Path to the Cessation of Suffering (or the Noble Eightfold Path) – the way to extinguish all suffering and attain Nirvana.
Parents teach children not to be harmful by using behavior rules. They teach them to be intelligent by using respecting rules. The way to teach children to be generous in by planting patience into them
Dhammacakkappavattana Sutta (บทธัมมจักกัปปวัตตนสูตร ภาษาอังกฤษ)