Spending caps?

I’m curious about something. For those of you who have multiple children, do you put a spending cap in place for each child? Jon has decided on a $100 cap, per kid. My parents always went nuts at Christmas, so I’m quite unaccustomed to such caps – I realize my parents went overboard each year and was striving for some sort of happy medium…. I just feel a little bit as though it’s not enough. Does anyone else have this issue??