Sound is made up of variations, or sound waves, that we can hear. These sound waves are formed by objects vibrating. ‘Sound’ – this wall chart includes information about the sound system, sound waves, sound energy, and much more. • Suitable for age-group 6 years and up • Size 48 x 73 cm • Colourful presentation • Durable • Both side laminated • Tear resistant This educational wall chart is ideal for all science enthusiasts and students of elementary grades. It can be easily displayed on walls of science classrooms, study rooms, or any learning centre and make learning interesting.