YouTube Kids - YouTube for the youngins on iOS and Android
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
Mashs and the Bear - Mashs and the Bear developed and published by 01Digital for Android and iOS devices.
Yout - YouTube to Mp3 Converter
BabyFirst - BabyFirst: Education Songs, Games, and TV for Kids is a safe and fun way for kids to sprout, start learning, and explore.
You-Get - Command-line utility to download media contents from the web