Mr Lippuner who organized the event is giving an introduction.
Explosions and flames always capture the attention!
At the end the "students" had time to ask some questions. Most of the were very impressive, and showed that they understood what Mr Caprez was talking about.
Some children coudn't get enough and wanted some hands-on-time at the end of the lecture.
The parents, patiently waiting for their children to satisfy their curiosity.
I must say I was very pleased to be able to attend this lecture, and all these intelligent and interested children fill your heart with happiness.