My boys baptism at 9mths and 1.5yrs.
They are baptism under the term 嬰兒水禮.
They have to take 堅振禮 when they grow.
However, you should check with your pastor if it is possible.
I'm Christian. We have 嬰兒洗禮. The meaning of this services is: 將bb獻給神. I know different 宗派 has different way to handle. The kids can 領聖餐 after they take the 堅振禮 when they growth up.