Baptism of grandchildren My grandchildren were not baptized and I was worried about it. They are going on a trip.   Therefore, I took it upon myself to baptize them.   What if anything is the Catholic Church's view of this?  My children are not practicing Catholics.  When my oldest grandson was a baby, maybe about six months old, I was giving him a bath in the kitchen sink and poured water over him and stated specifically, "In the name of the Father, the Son, and the Holy Spirit"...  I did this to the other four today.  I told my son and daughter.  My daughter just chuckled and my son was upset with me.  They were raised Catholic and went to Catholic school, but neither are practicing now.
Canon law states:

Canon 868
§1 For an infant to be baptised lawfully it is required:
1° that the parents, or at least one of them, or the person who lawfully holds their place, give their consent;
2° that there be a well-founded hope that the child will be brought up in the catholic religion. If such hope is truly lacking, the baptism is, in accordance with the provisions of particular law, to be deferred and the parents advised of the reason for this.
§2 An infant of catholic parents, indeed even of non-catholic parents, may in danger of death be baptised even if the parents are opposed to it.

Given that your grandchildren were not in imminent danger of death, it appears that your actions may have been in breach of canon law.