Help to find the plot of the film!

The story I remember the main details - no.
The main characters come to the island, where they will rest. A boy of 12 to 14 finds the place inhabited by weird as they are called all in the film. All their life: They Wake up, do routine chores, and in the evening they drop the bomb, but they have a device for otmachivanija time ago. And every night they spend on the day ago. They live one family, in which each of the children have some strangeness (for example a little girl has a giant mouth on the back of his head, hidden by hair is the only example that I remember...). Then in the plot, it turns out that the kid that rests on the island recognized for bye-bye, but it was done by a psychologist who had something to do with these strange. This is about half of the picture, and the rest,
though kill - I forgot. The film was released in 2012-2016 year, but it's the most unreliable information from this post.
Thanks in advance and hope for your answer!