Alva Review-Courier -

BOSTON (AP) — Child development experts and advocates are urging Facebook to pull the plug on its new messaging app aimed at kids.

A group letter sent Tuesday to CEO Mark Zuckerberg argues that younger children — the app is intended for those under 13 — aren't ready to have social media accounts, navigate the complexities of online relationships or protect their own privacy.

Facebook launched the free Messenger Kids app in December, pitching it as a way for children to chat with family members and friends approved by parents. It doesn't give kids separate Facebook or Messenger accounts. Rather...