Here's a new article that came out:
Do Jehovah’s Witnesses baptize infants?
No. The Bible does not endorse infant baptism. For example, it shows that before being baptized, first-century Christians heard the message, “gladly accepted” it, and repented. (Acts 2:14, 22, 38, 41) Thus, to be baptized, one must be old enough to comprehend what the Bible teaches, must believe it, and must have made a decision to live by those teachings. These are things that an infant cannot do.
As children grow, they may in time choose to be baptized. However, to do so, they must understand the commitment they are making.