There has been a massive increase in Australian children under 12 seeking help from a children’s mental health app and experts say the full impact of the coronavirus epidemic won’t be understood for some time. Smiling Mind, a mental health service for students, has recorded a spike in people accessing its free mobile phone app during COVID-19. The app, used by more than six million people, has seen a 350 per cent increase from children under 12 and 150 per cent from parents. “I don’t think we’ve fully seen the impact of the pandemic on mental health generally, and particularly children, yet,” Addie Wootten, CEO of the not-for-profit and clinical psychologist of 14 years, told AAP. “What we’re particularly concerned about is the traumatic impact of the uncertainty and changes we saw as a result of the pandemic last year. “Kids are particularly susceptible to trauma because they haven’t formed …