What kind of bonsai tree do I have?

[Fophul]

Hello there, I just get this tree from my girfriend yesterday, and I want to ask you guys, what kind of tree is it?
I think it is a baby tree, but I have no guess what is it's name or kind... Could you help me?

http://imgur.com/IVTbBQc
http://imgur.com/XYai4li
http://imgur.com/n7Bu0l9
http://imgur.com/zQ5Hd12

-Fophul

[rainbowgardener]

I think it is some kind of ficus, which is the most common indoor bonsai tree.