Children are filled with Love and attracted to people who radiate it or joyful high vibrations in general. I’ve noticed a similar effect with my Custom which has Chosen of Venus in it. I’m sure this is the module that has been replaced with the Libertine scripting to form Love Bomb!
Moreover, children go where they feel good, without hesitation which also relates to what @pacman said --, they have nothing to hide as they’re still living mostly unconsciously and therefore have no conscious, analytical and logical mind.