What would the world be life if we didn't have wheels? How do you think the ancient Egyptians moved huge stones to build the pyramids? Why does a mountain bike have such thick knobby tires? How do you think toys moved before batteries were invented? This title shows you how different kinds of these two simple machines are all around you to make your work and play easier.
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What would the world be life if we didn't have wheels? How do you think the ancient Egyptians moved huge stones to build the pyramids? Why does a mountain bike have such thick knobby tires? How do you think toys moved before batteries were invented? This title shows you how different kinds of these two simple machines are all around you to make your work and play easier.
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Seller's Description:
This is a used book in good condition and may show some signs of use or wear. This is a used book in good condition and may show some signs of use or wear.
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Seller's Description:
Very Good. Size: 8x0x11; Has some shelf wear, highlighting, underlining and/or writing. Great used condition. A portion of your purchase of this book will be donated to non-profit organizations. Over 1, 000, 000 satisfied customers since 1997! Choose expedited shipping (if available) for much faster delivery. Delivery confirmation on all US orders.
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Seller's Description:
Good. USED GOOD Former Library Book Hardcover. It has normal library markings including card holder/reference sticker and library call number on spine. Some cover scuff/indents on cover with some bumped corner and folded or wrinkled pages. It has school and/or library name blacked out with marker or white blackout sticker on page edges, cover and inside. Reinforced with white or clear library tape on some inside pages.