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do you mean routers? and no you dont you can connect quite a few to one on most routers you can connect about 4 wired and quite a few on wireless
Yes She did play in ice age 4
There is no age limits to play Plants vs. Zombies. But the ideal age to play it is 12 years old.
spark park
Yes to purchase songs but you can still play the songs you already have on the app. However, your level cannot be updated with no wi-fi until you play another song after you connect to the internet again.
you play with little people around the age of 4.
Steffie the mammoth!! 
I would do some research into a capture device which has no delay time.
Duh.
Yes, it is very possible that neither player will connect 4 on the 6-by-7 grid.
Yes, she does, and she voices Steffie.
It is totally okay. When he gets older, he'll soon play with girls. It is not only okay but it is normal for his age.