Travelling Notebooks - Interesting Data

Notebooks sent: 41
Notebooks returned: 15
Average posting cost: 2€
Some of the countries visited:

            Spain
Portugal
            Germany
The United Kingdom
France
Italy
Czech Republic
The Netherlands
Belgium
Hungary
Canada
The USA
Mexico
Oman
India

Cities visited: more than 40
Age of the participants: between 4 and 60 
Most travelled notebook: gone to 14 different places