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People pulled heavy things with ropes and pushed carts with no wheels.
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Wheels were invented! People could push carts faster.
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Big machines were made. They used push and pull to help people work.
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The first train was made. It could go fast using steam power!
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The first car was made. It could move fast with an engine.
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The Wright brothers flew the first airplane! It pushed through the air.
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Astronauts went to the Moon using a rocket that pushed up into space!
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Fast trains and cars use new energy to move even faster.
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Robots use push and pull to help in homes and schools.
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Maybe flying cars will zoom through the sky!