Who are the kids standing with players during national anthems at world cup?

The children standing with the players during the national anthems are the mascots of the FIFA world cup. The tradition of having mascots began with the 1966 World Cup in England. The mascots are usually animals or other characters that represent the host country. The mascots at the 2022 FIFA world cup in Qatar are La'eeb and his friends, each representing different traditional garments of Qatar. La'eeb, the official mascot is white and inspired by the traditional head dress worn in the middle east.