One of the experiments often raised in support of this the monkeys with toys experiment. This is where a group of male and female monkeys are given a selection of toys to play with. The results are that the male monkeys almost always chose the wheeled toys – the trucks and the toy cars – to play with. With the female monkeys it’s not quite as definitive – they don’t really have a preference, but they are far more likely to play with the dolls and the cuddly toys than the male monkeys are. And this, the scientists say, is because there are innate differences between the male and the female brain. So lets look at these differences.