YouTube Kids - YouTube for the youngins on iOS and Android
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Hopster TV - Netflix for kids
Tauria - True end-2-end encrypted group calls for up to 50 people
PBS KIDS Video - Home & Family and Education & Reference
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.