Koontz - The Chaotic Pendulum

Koontz - The Chaotic Pendulum

Discover how the power of mangetism causes this pendulum to undergo chaotic motion and keep you guessing what it's next move will be....

$15.95

Koontz - The Jet Car

Koontz - The Jet Car

Discover how the incredible jet force propels boats, planes and missiles....

$13.95

Out Of Stock

Koontz - The Kaleidoscope

Koontz - The Kaleidoscope

Discover a dazzling array of shapes and colours....

$13.95

Out Of Stock

Koontz - The Periscope

Koontz - The Periscope

Discover how to see without being seen...

$15.95

Out Of Stock