How old is too old for stuffed animals?

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Our son is 9 years old (3rd grade). He has always loved stuffed animals since he was a baby. He has a queen size bed and has all of them on one side of the bed. He doesn't carry them around to stores or anything but enjoys sleeping with them. Well he now has a sister (9 months) and she loves stuffed animals too. Drags them around, snuggles, etc..so I'm curious what age your child stopped? He now always makes sure we bring a stuffed animal for his sister whenever we leave, bedtime, etc.