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The story tells of Ivy, an inventor who finds a way to travel in space. One day she finds herself on a very polluted planet. The locals may die from so much rubbish, so the girl decides to help them. Together they build a space rocket out of rubbish. A rocket with a hundred floors!!! And they go in search of a new beautiful planet to live on. Their journey will have a very unexpected ending and will teach them a really important lesson.

The book has a GIANT tab where children can examine in detail all 100 floors of the rocket.