Fans of the ''New York Times'' bestselling ''Geek Dad'' and ''The Geek Dad's Guide to Weekend Fun'' will flock to the 3.0 version, ''The Geek Dad Book for Aspiring Mad Scientists.'' As Ken Denmead explains, most kids lack an understanding of science and an awareness of how it influences our everyday lives. What kids today need is a fun way to learn scientific concepts. This book will help scientists-in-the- making discover how our world works with creative project ideas, including how to: Grow crystals to power your Stargate and set your room aglow Extract your own DNA and decode your genes Build a MacGyver radio from nothing but cast-off electrical and office supplies Chock-full of instructional illustrations throughout, ''The Geek Dad Book for Aspiring Mad Scientists'' puts the fun back in science.