The Toyota Prius is becoming a family. But what do we call them. Prii? Priuses? Prium? Who knows?To dive deep into the nature of the plural, we created an educational music video. The piece familiarized our audience with the complex nature of plurals, the plural of Prius being the subject great debate. With this piece as a kick off, we opened up the digital ballot boxes for our Prius fans to determine that official plural of Prius.