One verse

Srimad Bhagavatam 10.11.59

10.11.59

एवं विहारै: कौमारै: कौमारं जहतुर्व्रजे । निलायनै: सेतुबन्धैर्मर्कटोत्‍प्लवनादिभि: ॥ ५९ ॥

evaṁ vihāraiḥ kaumāraiḥ kaumāraṁ jahatur vraje nilāyanaiḥ setu-bandhair markaṭotplavanādibhiḥ

evam
in this way
vihāraiḥ
by different pastimes
kaumāraiḥ
childish
kaumāram
the age of childhood
jahatuḥ
(Kṛṣṇa and Balarāma) passed
vraje
in Vrajabhūmi
nilāyanaiḥ
by playing hide-and-seek
setu-bandhaiḥ
by constructing an artificial bridge on the ocean
markaṭa
like the monkeys
utplavana-ādibhiḥ
by jumping here and there, etc

In this way Kṛṣṇa and Balarāma passed Their childhood age in Vrajabhūmi by engaging in activities of childish play, such as playing hide-and-seek, constructing a make-believe bridge on the ocean, and jumping here and there like monkeys.