Tin Can Phone.
P.I.R.A #: 3B39.10
Illustrates: Sound travels through a medium other than air.
Description: Sound travels through a metal spring from one end of the phone to the other.
Size: 18' stretched out.
Notes: Works better than the string version you had as a kid.
Hazard: Tangling up the spring.
Condition: Bad.
Instructor Comments
