The Fine Brothers, who are filmmakers, showed 13 California children videos of same-sex couples getting engaged and then asked them questions about gay marriage in a viral video that has been viewed more than six million times in five days.

Their reactions are priceless, ranging from confusion at the concept to acceptance and excitement.

The video was part of the Brothers' series called "Kids React." Another recent success was "Kids React to Controversial Cheerios Commercial," which followed controversy surrounding a Cheerios commercial that depicted a biracial family.