What did they use to baptize children with in the 13th century?

In the 13th century, children were typically baptized using water, which was considered a vital sacramental element in the Christian faith. The ritual usually took place in a church, where the priest would pour or immerse the child in water while invoking the Holy Trinity. In some cases, holy water, blessed by a priest, was used to signify the child's entry into the Christian community.