String wave machine 

That’s a pretty impressive simple setup that allows you to explore several different science concepts. Electron flow. Resistance. Harmonics in waves. Cool project.

Tq so much it rlly help us in our science project 😃✨

Exactly what kind of string is used?

Excellent!

What is that rope used? A Rubber band?

Amazing

The battery used is of what volt?

Densa la musica

Si ma a che serve?

what do you call that thing you put in the hole? (1:00)