Is there such a HotKey?

Question

macOS

Hello! I wonder if there is some kind of hot key for a storm that would block the keyboard from accidentally entering characters, I often work at home, I can leave the laptop for some insignificant time, well, a couple of seconds is enough for either a child (5 years old) to press something, or a cat can brazenly walk on the clave. Maybe someone met such a hot key type for "locking" the keyboard.

Answer 1

On Habré, I met such a game, the launch of which processes each keystroke on the screen with a characteristic background and sound. The program is killed only by the Alt + F4 combination.
Launched and any chaotic clatter of the keyboard will make the monitor blink in different colors and blink. Probably it will only warm up the interest of your child))

Answer 2

Have you tried closing the laptop lid?

Answer 3

in ubuntu, alt + tab, I go to an empty desktop (I work at home, my son is two years old)