国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 11月6日 06時41分

Repost from our @si_invention, who do the coolest things. Today they're playing with a prop, which is an object that isn't in the museum's collection and is designed to be touched. --- Today we got in some props that will be going into #sparklab. So of course, we had to know if they still worked. Up first, an early "dust buster" type vacuum, then an old telephone dry-cell battery.

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