I saw in a norwegian documentary about gender roles (the name is "Brainwashed") where he finds a scientist that want to test if toys are related to culture or n

I saw in a norwegian documentary about gender roles (the name is "Brainwashed") where he finds a scientist that want to test if toys are related to culture or not. What he do is get newborn babies as soon as he can, and give them human-looking toys, and mechanical-looking toys (ie: human looking are dolls of all sorts, and animals, mechanical toys range from simple geometrical shapes, like boxes and cylinders, to vehicles, machines, etc...) And the reaction from the babies to the toy is so precise, that you can predict what baby is male or female by toy preference alone. (ie: female babies always drift toward liking animal/human looking toys, while male babies go for the non-alive stuff)