Srimad Bhagavatam Canto 10, Chapter 18, Text 21

SB 10.18.21

acerur vividhah krida
 vahya-vahaka-laksanah
yatrarohanti jetaro
 vahanti ca parajitah
 
Translation: 
 
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.
 
Purport: 
 
Srila Sanatana Gosvami quotes the following relevant verse from the Visnu Purana (5.9.12):
 
harinakridanam nama
 bala-kridanakam tatah
prakridata hi te sarve
 dvau dvau yugapad utpatan
 
“They then played the childhood game known as harinakridanam, in which each boy paired off with an opponent and all the boys simultaneously attacked their respective rivals.”
Srimad Bhagavatam Canto 10, Chapter 18, Text 20
Srimad Bhagavatam Canto 10, Chapter 18, Text 22