Our wonderful Occupational Therapy Assistant, Sandi Hendrickson, demonstrates a great way to teach zipping to children.   Filmed by Eli Mc Kernan, Viper Productions Mary Kostka is a Pediatric Occupational Therapist specializing in Sensory Processing Disorder at  her  private practice, ‘Ohana Occupational Therapy, LLC,   in Wenatchee and Leavenworth Washington, USA