They still get older even though they are born on leapyear in the system. I had a friend growing up that was born on leapyear and she celebrated on Feb 28th every year that wasn't a leap year. Her parents also made it really fun for her and made her feel special for having a "disappearing birthday"
I am also due on February 29th 2016 and honestly hope to have my baby on that day even though it is unlikely.
How would it even work out? In the systems will my kids age still change or will they still be consider 1 for like 4 years? What do you do?