When I started thinking about celebrating the boys' birthdays at school I had a Whatsapp chat with both teachers. From grade 1 on there is not much time to celebrate and they basically sing, eat a cupcake and that's the end of it. I asked them if I should bring just cupcakes or a bit of sweets and a cupcake. The one replied that just a cupcake please (limit the sugar) and the other said that I could just as well leave the cupcakes because the kids are so tired of cupcakes they throw away half of them - and just send some sweeties. I then asked the first teacher specifically about cupcakes and got the same sort of reply. Then I suggested ice cream and both teachers replied extremely positive.
It was by far the easiest (and I may add rather cost effective as I bought it at the factory shop) festivity in a while.
So what do you do about school celebrations?