Contradiction with Job 21:11
Job describes children being carefree and joyous, which doesn't contradict Zechariah 8:5 about children playing in streets.
Job 21:11: They send forth their little ones like a flock, and their children dance.
Contradiction with Ecclesiastes 11:9
Encourages youth to rejoice and be happy, which aligns instead of contradicting with children's joy in Zechariah 8:5.
Ecclesiastes 11:9: Rejoice, O young man, in thy youth; and let thy heart cheer thee in the days of thy youth, and walk in the ways of thine heart, and in the sight of thine eyes: but know thou, that for all these [things] God will bring thee into judgment.
Contradiction with Psalm 127:3
Declares children as a heritage from the Lord, not a contradiction to their presence in Zechariah 8:5.
Psalm 127:3: Lo, children [are] an heritage of the LORD: [and] the fruit of the womb [is his] reward.