यत्रारोहन्ति जेतारो वहन्ति च पराजिता: ॥ २१ ॥
vahanti ca parājitāḥ
The boys played various games involving carriers and passengers. In these games the winners would climb up on the backs of the losers, who would have to carry them.
Śrīla Sanātana Gosvāmī quotes the following relevant verse from the Viṣṇu Purāṇa (5.9.12):
prakrīḍatā hi te sarve
dvau dvau yugapad utpatan
“They then played the childhood game known as hariṇākrīḍanam, in which each boy paired off with an opponent and all the boys simultaneously attacked their respective rivals.”