Yes, ofcourse there is a social networking sites for teens, such as facebook, myspace and twitter. You can also, join social networks like hi5, tagged, orkut. Literally there n numbers of social networking sites for every individual interests. If you have childrens, you can as them to join Scuttelpad.com, a social network for childrens. Here you will find that many activities are held on this network, in order to improve GK of childrens.
Hotmail
yes
funbrain.com
Redtube is a very popular site among 11-year olds.
Facebook !
There are plenty of websites suitable for 13 year olds. Facebook and Twitter both allow 13 year olds to use their sites, but it really depends on the child and how mature he/she is.
yes, all those types of social networking sites are safe as long as you use them safe by watching the people you accept, pictures you upload, and things you post.
You can be on Everloop as soon as you turn 8. It's for 8 to 13 year olds.
Wee worldFantageStardollHabboGaiaFacebookYoutubeMy Space
boohoo.com
Myyearbook.com
some interative websites are clubpenguin.com woogiworld.com, webkinz.com poptropica.com,