Dhruva was an ardent young devotee of Vishnu, a prince blessed by Lord Vishnu with eternal life and glory as the Pole star (Dhruva Nakshatra). The story of Dhruva's life is often told to hindu children as an example of perseverance, devotion, steadfastness and fearlessness.
Prahaladha, the child devotee of Lord Vishnu is considered to be one of the greatest saints of God, Hiranyakashipu casts himself as the enemy of Vishnu, He gets great boons from the creator Brahma, and imagines that nobody can kill him. He then proclaims that he himself is god.
SB 4.9.4: Although Dhruva Mahārāja was a small boy, he wanted to offer prayers to the Supreme Personality of Godhead in suitable language. But because he was inexperienced, he could not adjust himself immediately. The Supreme Personality of Godhead, being situated in everyone's heart, could understand Dhruva Mahārāja's awkward position. Out of His causeless mercy He touched His conchshell to the forehead of Dhruva Mahārāja, who stood before Him with folded hands.