This Sound Collector Kit  is an educational kit that will teach your students and children about how sound travels and sound waves. Sound travels through air as oscillating waves. The kit uses a microphone to pick up sound. The sound is then converted to an electric current which passes through the amplifier, and the amplifier increases the volume of the sound that you are trying to hear. This kit allows you hear faint sounds at a higher volume. The kit comes with the stereo earphones and microphone!  

A 9V battery is required but not included.

This is a good resource for STEM (Science, Technology, Engineering, and Mathematics) education and curriculum development for elementary, middle, and high schools.