For the first time in The Secret Life of… the boys and girls are pitted against each other, in a two-part special.

The aim is to discover if gender roles really are ingrained and whether there is a marked difference between the sexes even at such a young age.

Among the dilemmas this new batch of five-year-olds face is how much risk they should take during a penalty shoot-out, and how to be tactful after being served salty lemonade. Also, how do boys really think girls run?