The first widely known augmented reality children’s book using AR technology was Parrot Carrot, published in 2011, where characters and scenes could come to life when viewed through a camera-enabled device.
Inventions And Technology - Facts for Kids

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Random Facts About Inventions And Technology For Kids
The latest transparent TVs can switch between being see-through like a window and showing a normal TV picture!
Smart AI can learn to play video games without being taught the rules — just by watching the screen and trying different things!
Some AR navigation apps can show big virtual arrows and signs floating over the sidewalk or street in front of you through your phone camera. These help you follow walking directions more easily, but they still rely on GPS and camera data, so you need the right phone and good signal for them to work well.
Train wheels have a tiny safety lip called a flange on the inside edge. It acts like a guardrail, keeping the wheel safely on the tracks — even around curves!