Guy Raz receives a very mysterious invitation in the mail ... one that's over 150 years old! It's an invitation to the Metric Convention; the kick off party that launched the Metric System! But why Guy Raz? And why 150 years too late? Mindy and Guy travel back in time to 18th century France to learn all about the creation of the metric system and to find out how sent the invitation to Guy Raz in the first place. It's the Who, When, Why, How and Wow of the Meter!

Grownups, visit tinkercast.com/planetwow to learn more about our trailblazing, audio-filled, adventure-packed GeoTour designed to get you and your family out into nature and on a mission to uncover geocaches filled with trackable Planet Wow! trading cards and more WOW surprises! 

Join the World Organization of Wowzers today and receive quarterly mailings and birthday cards, access to 1000+ digital activities, first dibs at live show tickets, plus a welcome kit with t-shirt and an autograph from Mindy & Guy Raz! Visit https://bit.ly/40xiRrH to sign your Wowzer up for a membership to the World Organization of Wowzers today!

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