Well my daughter is in 5th grade, and some of the kids are turning 11.
What the kids like... are those Fruit roll ups things... "Fruit By The Foot." They also like brownies, from Costco. Its good.
They also like, Popcorn, in ziplock bags.
They also like, Popsicles.
I would not buy "toy" type goody bags... but food, snack type things that they can EAT.
OR if you want something useful, then those "Japanese Food Erasers" are a big hit... here in my State. You can find it online. Kids, both boys and girls, LOVE those and collect it.
And kids always need, erasers.
Or they also like those "Gelly Roll" pens. You can buy it in a multipack, break up the pack, and put a single one in each bag.
Yes, as I said, my daughter is in 5th grade. Some of the kids... DO still bring birthday food type treats for their class... or goody bags still. BUT the Teacher does not TELL the child to do it, nor does the Teacher instigate it. It is the child... or the parent... that decides. It is their, choice. And if a parent or child wants to do that, the Teacher allows it. As long as it is not nuts because the school is a nut-free school.
As for the goody-bag "madness"... no, at my daughter's school it is not madness. And this is the last year of elementary school before the 5th graders go onto, middle school. That is how it is per grades here. Anyway, so although I myself generally do not do goody bags... being this is my daughter's LAST year of Elementary school, for her Birthday this year, I will bring some brownies for her class. It is just sentimental... before she goes onto Middle School, and therefore, these cute kid things, will then be non-existent! And kids at that age won't even want... you around! So why not? My kiddo is only in 5th grade... and the kids in her grade are still very nice kids mostly... not miniature "teen" mode kids who disdain kid, things. Yet. They, from what I observe, still have a gaiety about... birthday treats and what not. Its nice to see. Kids, being kids.