That's what I had thought too. (I don't miss bananas, but I can empathizes if you do).
Perhaps the teachers can do away with birthdays entirely so that no one feels left out or that no one feels more special than the other?
We had all that stuff growing up and we were skinny. I grew up in the 60's and 70's. I still think its lack of exercise (too much computers, video games and cable tv). We were outside playing all the time and hardly ever watched TV except for nighttime just before bed. But that's only my opinion.