Beautiful robotic models whose operation is demons...

Beautiful robotic models whose operation is demonstrated on small screens ... It would have been nice to be able to manipulate ... Exactly, my daughter of 11 years was more interested in the models exposed when she could listen to the video shown using a phone-like audio device, move a 3D model on a screen and manipulate two different rods. There are some very interesting little mechanics on the second floor as well as some intriguing holograms. See photo-montages.