Wireless router potential problem!!?

Hi all!! I am *hopefully* going to get a wireless internet thing going but i want my son to be able to surf the net (obviously safely) on his computer in his bedroom. My problem is that his computer an my computer are very far away from each other (mine's on the ground floor and his is on the second... show more Hi all!!

I am *hopefully* going to get a wireless internet thing going but i want my son to be able to surf the net (obviously safely) on his computer in his bedroom. My problem is that his computer an my computer are very far away from each other (mine's on the ground floor and his is on the second floor). Will this be detrimental?? Can this be done?? If so, please explain how (but in plain english as i'm a bit thick when it comes to computers!!)

Many thanks

Sal x
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