Children are a gift from the Lord; they are a reward from him.  Psalm 127:3

But Jesus said, “Leave the children alone, and do not forbid them to come to Me; for the kingdom of heaven belongs to such as these.”  (Matthew 19:14)

They shall praise His name with dancing; They shall sing praises to Him with tambourine and lyre. (Psalm 149:3)

And David danced before the Lord with all his might; and David was girded with a linen ephod.  (2 Samuel 6:14)