Space Cadet by Robert Heinlein:
Science Fiction Inventions, Technology and Ideas

This Heinlein juvenile - a novel written particularly for the 12+ crowd - is dated but still a good story. The Space Cadets are the guardians of the solar system; only the best of the best are accepted. And how often do you get to prove yourself on Venus? Select an invention:

Atmospheric Braking

Gravity Centrifuge

High-Frequency Oven - essence of the microwave

Microwavable Food - pre-packaged ready to heat-n-eat

Personal Rocket Jet

Portable Telephone - early reference

Space Boots (Cat Feet)

 

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