The “refresh rate” of a TV (measured in Hertz or Hz) tells you how many times per second the image updates – most modern TVs refresh 60 to 120 times every second!
Inventions And Technology - Facts for Kids

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Random Facts About Inventions And Technology For Kids
Cool Capabilities
GPS can help track the migration patterns of animals like whales, birds, and sea turtles!
AI can beat human champions at over 50 different types of games — from chess to video games!
Future & Innovation
Scientists are teaching AI to understand and respond to human emotions — like having a computer that knows when you’re happy or sad!
Coding apps for iPads teach children as young as 4 years old the basics of computer programming through fun games and puzzles.