Elinor Wonders Why FULL EPISODE | Echo Location / Ears to You | PBS KIDS

On a camping trip, the kids discover that Ari is really good at playing Marco Polo. Even without saying "Marco," a blindfolded Ari can easily figure out where Olive and Elinor are. How does he do it? / One day while playing at the lake, Elinor and her friends notice something very interesting -- they can't see ears on some animals. That's so interesting! How do they hear?
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