Four kings defeat five kings and carry off Lot and all his belongings from Sodom. When Abram hears, he takes 318 trained men, chases the kings north, and rescues Lot. On the way back, two kings meet him: Melchizedek, the mysterious priest-king of Salem, blesses Abram and receives a tithe; the king of Sodom offers Abram all the goods, but Abram refuses to take anything — so no one can say the king of Sodom made him rich.
Abram was brave and loyal for his family. When we help others for the right reasons, God is pleased — and we don't need to keep what we've earned if it would tie us to the wrong people.
Genesis 14 introduces Melchizedek — a priest of 'God Most High' whose identity and order are so unusual that Psalm 110 and Hebrews chapters 5–7 develop him as a type of Christ: king of righteousness, king of peace, priest forever. Don't over-explain typology to young children, but the story sets up a wonderful conversation: what does it mean that a king brought bread and wine and blessed God's servant? Abram's refusal to take the king of Sodom's wealth is a picture of integrity — not letting the wrong person be able to claim credit for what God has done.
When we do something good, we give the praise to God — not to people who might want something in return. We can be brave and loyal for our family like Abram was.