Provincial police say officers were called to an elementary school in Renfrew on Thursday after the youngster was found with what appeared to be a lighter.
But, police say it was actually a concealment device containing cocaine.
Investigators say a relative of the child admitted the drugs belonged to him, and he's been charged with possession.
The man is to appear in court in Renfrew on Nov. 13.
The name of the man and other details were not released to protect the identity of the child.
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