In an oval metal Frame, childrent will walk, ran and play while learning that sounds travel in the form of waves through the air.
The will also learn that we hear sounds from the vibration of the air and we hear echoes because sound waves strike objects and bounce back into our ears.
In addition, different kinds of living things can hear sounds at different wavelengths, such as humans up to 20,000Hz, dogs up to 30,000Hz, rats up to 100,000Hz and bats up to 120,000Hz.
Blue whales sing at the sound level of 188dB.
Surprisingly, we can see sounds via tuning forks.