Eat around, eat around, eat around, eat around, why is it called a train?

The reasons why shopping and eating are called small trains are as follows:

1. According to the relevant information, shopping and eating sounds like the sound of a train, so we named it for convenience. It’s called a small train, which also means going shopping and eating.

2. According to the relevant information, there happens to be a small train inside. When you are tired of shopping, you can make a small train and have fun.