People do not see a fish - level 1
Chinese scientists invent a gadget. When you put something inside, you cannot see it. It becomes invisible.
The gadget is small. It is only five centimetres tall. It can make invisible only things that are small, like small fish.
The gadget uses special glass. It tricks our eyes. Scientists cannot make the gadget bigger. It is not easy.
Difficult words: invent (make), gadget (thing), invisible (when something is invisible, you cannot see it).
You can read the original story and watch the video in the Level 3 section.
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