John Ferrara is a user experience designer and the author of the book “Playful Design: Creating Game Experiences in Everyday Interfaces,” published by Rosenfeld Media. John has worked in UX design for over fifteen years, designing web sites, desktop software, and video games. John’s nutrition education game “Fitter Critters” was a top prizewinner in the 2010 Apps for Healthy Kids contest, awarded by Michelle Obama’s “Let’s Move!” campaign. You can follow John on Twitter at @PlayfulDesign.