Of the most interesting, I would like to highlight the Hall sensor and temperature sensors. For example, from the Hall sensor, you can make a rather simple levitron, as you probably know the Hall sensor is able to pick up a magnetic field, so it is inserted into the center of the electromagnetic coil so that the module picks up the magnetic field and regulates it, more precisely, it turns the coil on and off, then set the coil on a small stand on an elevation, turn it on and set a small and light ball with magnetic properties under the coil, after these actions the ball will begin to soar in the air, as if levitating (if Of course, you did everything right and tuned it up) this is due to the fact that the magnetic field either throws the ball up or down, but this happens at a very high frequency, due to which it seems that the ball weighs almost non-movably in the air. Actually quite entertaining homemade, I think then to do this.
The set also has laser sensors and the laser itself, I think you can use them in some kind of laser alarm, if you're interested, you can read about it on the Internet.
The set is very extensive, and most likely it will be cheaper to take such a large one than all the modules separately, although who knows, for example, if you only need a couple of such modules for a project, then naturally taking a whole bunch will not be so profitable.
Well, thank you all for your attention and good luck in future projects, friends!
Cost: ~ 753