system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do the soccer players walk out to the pitch holding hands with children?
gpt
FIFA and UNICEF are partners. They work together to spread awareness of children being drafted as soldiers. They also do it as a charity thing sometimes also. They also walk out with children from the you get teams. AC Milan and Barcelona and many teams have youth programs and children from the team are sent out with the professionals. 

Tldr: many reasons, UNICEF awareness of child soldiers and charity for kids to meet pros are just two.