the winner is the suggestion made by the Spanish team:

The students from the partner countries voted online:

https://www.tricider.com/brainstorming/33Nr91PhnmN;jsessionid=0OjyXHQfts7815O_6cAhWQ?fbclid=IwAR1605qohEF28jmEGEAJDCIT9qfiRSP15x6e5ESnXebFA7jppB5Bdr4sCSU

THE PARTNER SUGGESTIONS:

Here are logo suggestions of the Polish team:

http://www.tricider.com/brainstorming/33Nr91PhnmN

The Bulgarian team have 2 suggestions for  project logo. We made an internal school contest and this two logo suggestions received  the same vote from the students. Because of that  we suggest  for our project logo contest 2 logo variants

after voting here are the two suggestions:

The Greek team has the following suggestion for the project logo. 

this is the Italian suggestion

The German suggestions

The Spanish logos:

Number 1:

Number 2: 

Number 3: