diving into the science of light and sound waves with physics
"Red Kangaroo is having a fun day at the beach! She loves watching the waves go up and down, but, suddenly, she has a question: Do the waves ever stop? Dr. Chris has the answer-not only do waves never stop, but there are all kinds of waves around us! Discover all the waves you can and can't see, plus the waves you can hear!"--Publisher.
