From there, the Gospel of the Nativity according to Luke was proclaimed, and the statue of Baby Jesus was placed in the niche, traditionally identified as the manger.

Source: https://www.ncregister.com/cna/midnight-mass-in-bethlehem-patriarch-addresses-gazan-christians-calls-for-end-to-war

The little plastic baby inside modern king cakes is a nod to the three wise men who visited Baby Jesus on Twelfth Night, and it is tradition for the person who finds the baby in their slice to host next year’s Mardi Gras party and buy the king cake.

Source: https://parade.com/living/mardi-gras

Then dressed in their rich attire, accompanied by their pages carrying the three biblical presents, gold, incense and myrrh, one by one, they will present their gifts and pay homage to the Baby Jesus.

Source: https://gozo.news/101438/triumphal-entry-of-the-three-kings-to-xaghra-square-on-sunday/