There's no age at which a kid should stop sleeping with a teddy bear.
If the kid wants to sleep with a teddy bear then they should be allowed too.
I'm an adult and I sleep with a teddy bear every night as I cannot sleep without him.
I would never take a teddy bear away from a kid no matter what the age as there's no reason to stop a kid from sleeping with a teddy bear.
Nobody outside the kids parents and family living in the house has to know about it anyway.
I would never take a child's teddy bear away as teddy bears are not just for kids as they are a comfort object for anyone of any age.
Teddy bears are wonderful to have and to sleep with.
It's okay for adults, teens, older kids etc to all sleep with teddy bears.