Okay, so imagine you have a really long, thin toy train that can go really fast. That's kind of like what the Schienenzeppelin was - a train that could go faster than almost any other train at the time.
But the Schienenzeppelin was extra special because it was designed to look like an airplane. It had a long, pointy nose and big, curved wings on the sides.
The train flew down a special track called a railway line, which was like a long, flat road made just for trains. But even though it looked like an airplane, it didn't actually fly in the air - it just went really, really fast on the ground.
The Schienenzeppelin was invented a long time ago, back in the 1930s, when people were still trying to figure out how to make things go really fast. It was like a big experiment, to see what kind of awesome things people could create.
Today, people still love the Schienenzeppelin because it was such a cool invention, and it helps us understand how far we've come in developing fast, efficient transportation.