If the xbox and ds's can't get signal I would think that a range extender wouldn't either, so, 3 things you could do: 1. Install dd-wrt on your router and increase the transmit power to 251 mW (the max). 2.
Buy high gain antennae, like 9-16 dbi high (source link to eBay seller) and swap out the antennae you have on the router currently. 3. Both 1 and 2.
FYI, if this works, and you have neighbors that use WiFi, you might wash-out there signal.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.