Psalm 34:11, "Come, you children, listen to me; I will teach you the fear of Yahweh," is an invitation to instruction, not an instilling of literal terror, but rather a reverential respect and obedience to God. Let's break it down:

"Come, you children, listen to me": This is an invitation to learn. It suggests the speaker is in a position of authority or wisdom, offering guidance to those who are younger or less experienced. The term "children" can also be interpreted figuratively to mean those who are spiritually young or new to the faith.
"I will teach you the fear of Yahweh": This is the key phrase. "Fear of Yahweh" (or "fear of the Lord") is a complex concept that doesn't simply mean being afraid of God. It encompasses:

Reverence: A deep respect and awe for God's power, holiness, and majesty. Recognizing God's greatness.
Obedience: A desire to please God and live according to His commands. It involves actively choosing to follow God's will.
Trust: Understanding that God is good, just, and faithful, and trusting in His guidance even when things are difficult.
Humility: Acknowledging one's own limitations and dependence on God. Recognizing that we are not self-sufficient.
Avoidance of Evil: Because of the reverence and respect, a motivation to turn away from sin and anything that displeases God.

In Essence: The verse means that the speaker wants to teach his audience how to live a life that is pleasing to God. He wants to impart the understanding of God's greatness and goodness that motivates one to obey, trust, and revere Him, ultimately leading to a fulfilling and righteous life.
It's about cultivating a right relationship with God, marked by respect, obedience, and trust, rather than a cowering terror.