One set of Sound Cylinders has white lids, and the other has black lids. Each cylinder in the first set has a mate in the second one that produces an identical sound.
The child must find the pairs by shaking each cylinder and listening and then grade them from the loudest to the softest. This activity is also important because it can provide detection of hearing problems at an early age.
This set of 10 Sound Cylinders is designed to be a less expensive alternative to the traditional wooden sound cylinders. They are made of heavy cardboard and plastic.