Out of curiosity, what happens if you have multiple kids in sequential years? Do you get three years off and $25k each year for three kids? How far does that ex

Out of curiosity, what happens if you have multiple kids in sequential years? Do you get three years off and $25k each year for three kids? How far does that extend? 18 months seems like a long time to take off from working, even if it is broken up across multiple years.