I shake my head every time I see the tarantula and scorpion skeletons. It's basic freaking biology. But then again, it's also just a Halloween decoration. There's lots things you see & do on Halloween that you otherwise wouldn't: zombies, rats with glowing eyes, witches, werewolves, goblins, willpower to avoid eating candy from strangers...
Meh, I've always just figured that they're their own spooky bone-monster thing instead of supposedly representing what an actual spider/scorpion's skeleton looks like. I think I remember coming across bone spiders in a video game once too for example.
They also make dog skeletons that have their ears and noses which people like to make fun of, but obviously the designers don't actually think dogs' ears are made out of bone. It's just a neat stylistic choice that IMO gives them more character and makes them more recognizable as dogs. I have like 8 so far and can't stop collecting them...somebody help me
I have both the spider and scorpion skeletons and I love them! I use them in the classroom as visual aids when I teach the kids about exoskeletons. First I show them the plastic "skeletons" and ask how many of them think that's what arthropods look like on the inside, then I explain to them about exoskeletons and molting. I show them a set of arthropod x-rays (https://www.amazon.com/Insect-X-rays-and-Picture-Cards/dp/B0012RMOM2) and break out some real insect and tarantula molts that they can see and touch.