I think God gave us children to help us understand Him more. Few things fill my heart with joy like when I see my little ones loving on each other and being sweet to each other. Few things make me as mad as when they hurt each other. I know that when we love one another it makes God smile. He is our heavenly Father and He loves when His kids dwell together in unity.
Behold, how good and pleasant it is when brothers dwell in unity! It is like the precious oil on the head, running down on the beard, on the beard of Aaron, running down on the collar of his robes! It is like the dew of Hermon, which falls on the mountains of Zion! For there the Lord has commanded the blessing, life forevermore.
Psalms 133:1-3 ESV