Looking for our logo

There is no good youth exchange without good logo and it is high time to look for the logo for our exchange. As not all of us are tallented in multimedia, we asked some of our friends to help us with creating the logo of "Grow with the flow". There are planty of ideas and all of them are very interesting... but we have to decide something... We found out that having an owl in the logo is nice and very connected to the place we are going to stay in... What do you think about them? Any other ideas?