Two of my three were HORRIBLE in church. Those were my days of just trying to be blessed by being present. Weddings were the worst...esp. my own brother's ....ugh!
Each child is unique and special. Jesus loves children!
I have learned something very special. The older people of your parish LOVE hearing the young ones. It gives them hope, faith, and re-living their own experiences. By bringing our children to church, we are giving to our church and community. We are passing on our faith.
What I still have for my young neices & nephews, is a church bag. This is only for church. Inside is special religious books (some are just books from dollar stores and pop-up books and Christmas/Easter/Saints) Then a no noise stuffed animal. Yes many animals make noise so its got to be an animal that doesn't make noise...ie rabbit or fish. The material in it can't make noise either. Prayer cards on a ring is also a really nice for the slightly older child (4yrs).
The ironic thing is your child will remember none of this, but you will.
I believe God blesses mothers who attend mass with young ones!!!