I have two DC close together who are just coming up to the age where they understand presents and special occasions. My DM keeps talking about buying one a present on the other's birthday. Her reasoning is that they are too young to understand why they don't also have presents and they'll be upset.
Despite this having been done with me, it's never really occurred to me to do this with my own children. My natural instinct tells me I shouldn't be teaching them to expect gifts on someone else's special day, but my DM thinks I'm being mean. Are they too young to understand? Is this a widespread practice?