Sometimes there is a need for an autonomous, inexpensive security alarm, for example, for protection in a country house. The use of industrial designs in such cases may not be economically feasible.

How to get ice instantly? Interesting? Watch the video, read the recipe, and make it (everyone has all the ingredients at home)! This is really a very interesting thing! (The liquid freezes before your eyes in a matter of seconds!) Surprise your friends and acquaintances! This is very

What's a disco without a disco ball? But it is not on sale! No problem . . . .