خصومات حتى 50% لفترة محدودة

Why Is It So Loud? (Level 5)

2.250 KD 3.000 KD
It has reached the maximum quantity available.

A series of twenty non-fiction science readers which engages children in the world around them. Why do I hear thunder after I've seen lightning? What is sound? How do our ears hear sound? You can find the answers to these and other questions about sound in Why Is It So Loud?