The short version
We're a year away. Here's what I've been told, what I'm checking, and what I'll do with it.
What happened
He's three. Playschool proper is a year off, and already the bag conversation has started at the park. So I did what I do before every stage: I asked the mums whose kids are a year or two ahead, and I wrote it down. Nothing here is a verdict. We haven't lived it.
[Name], whose daughter is five, said the thing nobody tells you is the weight of the empty bag: a padded, structured bag can weigh more than what goes in it. She switched to a soft one in the second term.
[Name], a mum in our building, said the zip is what fails first, and that her son couldn't open a magnetic flap on his own at four, which meant a teacher had to, every single day.
[Name] said to buy the bag from the school's uniform shop even if it costs more, because the strap length matched the kids' heights and the market ones didn't. I'm not sure I believe that one yet; it's on my list to check.
What I'm checking before we buy: the empty weight, whether he can open and close it himself, whether the straps sit on his shoulders rather than his neck, and what the school actually asks for. When we get there, this becomes a story from our home.
General guidance on children's backpacks from the American Academy of Pediatrics: a loaded bag should weigh no more than 10 to 20 percent of the child's body weight, with wide padded straps worn on both shoulders. That's a wider point I checked; it isn't a verdict on any bag.
AAP HealthyChildren, Backpack safety. SourceProduct details are as we used them; the version on sale now may differ. Check the exact model and the manufacturer's instructions.