Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
YouTube Kids - YouTube for the youngins on iOS and Android
PlatformIO - Next-generation IDE for IoT
Mashs and the Bear - Mashs and the Bear developed and published by 01Digital for Android and iOS devices.
B4R - Development tool for native Arduino programs.
BabyFirst - BabyFirst: Education Songs, Games, and TV for Kids is a safe and fun way for kids to sprout, start learning, and explore.