Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 15

Sanskrit:

क्‍वचिच्च दर्दुरप्लावैर्विविधैरुपहासकै: ।कदाचित् स्यन्दोलिकया कर्हिचिन्नृपचेष्टया ॥ १५ ॥

ITRANS:

kvacic ca dardura-plāvairvividhair upahāsakaiḥkadācit syandolikayākarhicin nṛpa-ceṣṭayā

Translation:

They would sometimes jump around like frogs, sometimes play various jokes, sometimes ride in swings and sometimes imitate monarchs.

Purport:

Śrīla Viśvanātha Cakravartī Ṭhākura explains the word nṛpa-ceṣṭayā as follows: In Vṛndāvana there was a particular place on the riverbank where people who wanted to cross the Yamunā would pay a small tax. At times the cowherd boys would assemble in this area and prevent the young girls of Vṛndāvana from crossing the river, insisting that they had to pay a customs duty first. Such activities were full of joking and laughter.