Prepare dough and roll out 1/8 in. thick. Cut using gingerbread boy cutter from set. Bake and cool completely.
Prepare Color Flow Icing Recipe. Tint portions green, red, yellow; reserve some white.
Make shirt. Use tip 2 and full-strength green icing to outline shirt. Use thinned green icing in cut disposable decorating bag to fill in. Let set.
Make pants and suspenders. Use tip 2 and full-strength red icing to outline pants. Use thinned red icing in cut disposable bag to fill in pants. Use tip 2 and full-strength red icing to pipe suspenders.
Make facial features. Use tip 2 and full-strength white icing to pipe dot eyes and outline mouth.
Make bow tie. Use tip 2 and full-strength white icing to pipe bow tie and dot in center. Pat and smooth with finger dipped in cornstarch. Let set until dry.
Make hair. Use tip 2 and full-strength yellow icing to pipe hair. Let dry.