A test for those who remember the USSR: guess the purpose of the thing in the photo!

Do you know, for example, that the kyiv Semiconductor Plant produced … a wet layer indicator? As soon as the sensor in the fabric got wet, a red light came on on the remote indicator.

Few people have used the gadget – usually children, even without a device, quickly let their parents know that it’s time to change clothes. But for those who were born “silent”, “Firefly” was a real salvation, because not a single baby benefited from a long stay in the rain.

The wet diaper indicator wasn’t part of our test, but there are plenty of other fun items – let’s see if you can guess what they’re for!

Want to be a little more nostalgic? So try to guess what is happening in these photographs from the time of the USSR!