What's the longest running animated show in TV history?

Nope, it's not that one.

Let’s take a little dive into the history of this mysterious packet about The West German Sandman.

Recently, I posted a snap from a View-Master packet produced in Belgium that featured the story of The Zandmannetje, or The Sandman. I had no context for this packet beyond finding the photos charming. While the packet is in Dutch, I soon found out that t…