Nine-year-old twin brothers Hunter (L) and Devyn of Vancouver pose for the photograph during the World Autism Awareness Day festival, sponsored and organized by Canucks Autism Network, in Vancouver, Canada, April 28, 2013. The family festival includes an autism walk, family-friendly activities, live entertainment, food and special visits by surprise guests. (Xinhua/Sergei Bachlakov)

A young hockey fan poses for the photograph at World Autism Awareness Day festival, sponsored and organized by Canucks Autism Network, in Vancouver, Canada, April 28, 2013. The family festival includes an autism walk, family-friendly activities, live entertainment, food and special visits by surprise guests. (Xinhua/Sergei Bachlakov)

Hundreds of kids and their parents attend the annual World Autism Awareness Day festival, sponsored and organized by Canucks Autism Network, in Vancouver, Canada, April 28, 2013. The family festival includes an autism walk, family-friendly activities, live entertainment, food and special visits by surprise guests. (Xinhua/Sergei Bachlakov)

Eleven-year-old Destiny is comforted by her mother during an annual World Autism Awareness Day festival, sponsored and organized by Canucks Autism Network, in Vancouver, Canada, April 28, 2013. The family festival includes an autism walk, family-friendly activities, live entertainment, food and special visits by surprise guests. (Xinhua/Sergei Bachlakov)

Canucks Autism mascot Pinkus (R) hugs a boy during the annual World Autism Awareness Day festival, sponsored and organized by Canucks Autism Network, in Vancouver, Canada, April 28, 2013. The family festival includes an autism walk, family-friendly activities, live entertainment, food and special visits by surprise guests. (Xinhua/Sergei Bachlakov)

Four-year-old Lyca of Vancouver plays with bubbles at the annual World Autism Awareness Day festival, sponsored and organized by Canucks Autism Network, in Vancouver, Canada, April 28, 2013. The family festival includes an autism walk, family-friendly activities, live entertainment, food and special visits by surprise guests. (Xinhua/Sergei Bachlakov)