Ourworld and Club penguin are!
world record javelin throw under 13s
There are 19 13s in 250. 250/13 =19.23
The plural for thirteen is thirteens (13s). As in "they are in their thirteens".
Yes it is dangerous, because less then 13 years child can be trapped easily by devilish world.
They shouldn't be (by their own TOC). However, anyone that can use a computer can sign up, so I'm sure some under 13s are on it
It is 169.
http://sarahtijou.blogspot.com/ newcomer on the blog by a teenage girl at college, safe and friendly for all teens, under 13s too
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Club Penguin Panfu Tootsville Milsberry Babydow Neopets Marapets Moshi Monsters Bin Weevils
It seems like there is a typo in your question. It is unclear what you mean by "13s in the usf." Could you please provide more context or clarify your question?
13s - 2