Amla tree

So along with other little cowherd boys, Kṛṣṇa and Balarāma went into the pasturing ground and took charge of the calves and played with Their playmates. While taking charge of the calves, sometimes the two brothers played on Their flutes. And sometimes They played with āmalaka fruits and bael fruits, just like small children play with balls.

(Kṛṣṇa Book 11)

In the Skanda Purāṇa it is directed that a devotee should offer water to the tulasī plant and āmalaka trees. He should offer respect to the cows and to the brāhmaṇas and should serve the Vaiṣṇavas by offering them respectful obeisances and meditating upon them. All of these processes will help the devotee to diminish the reactions to his past sinful activities.

(Nectar of Devotion 7)