In some places both Kṛṣṇa and Balarāma were accompanied by Their friends. The boys were singing, imitating the humming sound of the drones and accompanying Kṛṣṇa and Balarāma, who were garlanded with forest flowers. While walking, the boys sometimes imitated the quacking sound of the swans in the lakes, or when they saw the peacocks dancing, they imitated them before Kṛṣṇa. Kṛṣṇa also moved His neck, imitating the dancing and making His friends laugh.
Krishna Lilas - The Nectarian Pastimes of the Sweet Lord
Nanda Maharaja was overwhelmed with jubliation when Lord Krishna appeared as his son. He arranged for a magnificent birth ceremony according to the Vedic regulations and invited brahmanas to recite Vedic mantras. He arranged for the worship of the demigods and forefathers and he gave two million cows, decorated with cloth and jewels, as well as seven hills of grain, in charity to the brahmanas. Summarized from Krishna Book, Chapter 5, Meeting of Nanda and Vasudeva