Don’t stick to just cups and string. Try replacing them with other materials to experience the difference.
Of course, you can learn about sound waves as well.
- Sharpened pencil
- Awl, knife or similar
- Paper cups or cans, 2
- String (kite or fishing line)
String — Cut a piece approximately 50′ long.
Cup — Poke a hole in the bottom of the cup. Try to hit the center. Thread an end of the string through the bottom of each and tie a knot inside the cup.
Use — Make sure the line is tight and not touching anything else. Talk to each other.
Option — Try different items to replace the cups to explore the differences in materials.
To download a PDF of this Grab ‘n’ Go sheet, click here: GnG_TelephoneA_lrl