improvised telephone

1.Poke the 2 cups to make the hole by using a cutter/scissors.
2.Cut the string/yarn.
3.Put the yarn/string into both cups with holes.
4.Tie up the yarns tightly, so it can be connected.
5.You can now talk with your classmates.

Conclusion:
I learned that the string/yarn has to be straight so we can communicate with each other. So the sound will travel on the straight yarn/string, but if it's blocked we can't hear the sound.

Reflection:
I think this activity can figure out how does the sound travels through the string.