It's important to follow some esafety rules in this project. Check the following links with some advice and recommendations. Follow the instructions and have a safe use of internet.
You can watch this presentation
Check the following links for more details:
1. Esafety in eTwinning
2. Rights and responsibilities
3. Privacy and data protection
5. Social networks and social media
6. The challenges of online communication outside eTwinning
7. Safer Internet Day
Finally, you can click this useful link about kids and internet and a final video.