"David Aguilar was born missing part of one arm, a small detail that seemed to define his life and limit people's ideas of who he was and who he could be. But in this funny and heartfelt memoir, David proves that he can throw out the rulebook and people's expectations and maybe even make a difference in the world--and all with a sense of humor. At only nine years old, David built his first prosthesis from LEGO bricks, and since then he hasn't stopped creating and thinking about how his inventions, born from a passion for building things, could fuel change and help others." --provided by publisher.