Inclusion Criteria:  children aged 6 to 8 years old, attended at Forp's Pediatric Dentistry Clinic, with complete record in the medical record, parents or caregivers who have Smartphone and Internet access and who are willing to download the V4H and WhatsApp application and accept to participate in all stages of the research upon acceptance of the consent form.  Exclusion Criteria  :Children who present pain and/or spontaneous sensitivity, motor difficulties and health disorders .