What are the materials?

The grandfather helps Nadine and Dana in finding some treasures made from different materials.. but, what do materials mean in essence? With the help of their grandfather, a goldfish bowl, and a chocolate-made teapot, they quickly discover more. This book is an ideal model for home or classroom; it contains notes for parents and teachers, with suggestions for ways to explore and interpret scientific topics. Size: 20.5*18.5 cm Number of pages: 32 pages