As any parent will tell you, a common feature of the school holidays is an increase in squabbling kids. Whether in the back of the car, at the park or by the TV, you will hear the whingey sounds of “Muuuum, Ollie just called me a stupid head!”
Click here for original story, Are your squabbling kids driving you mad? The good/bad news is sibling rivalry is ‘developmentally normal’
Source: Phys.org