Sc Cilandak (Expanding later)
This book covers all the basic questions a young child may have about the who, what, why, and especially the how of everyday things. Focusing on how things are made, refined, and used by people, this book provides kids with simple, accurate explanations.
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All about roads and vehicles.'
In this book you can learn about machine mechanism in our daily activities.'
What do the rollere coaster's machines work?