Imagine you're going on a road trip, but instead of a car, you're riding in a big wagon pulled by a horse. That's what people used to do a long time ago before cars were invented.
The wagon is called a buggy and it's like a big box with seats inside for people to sit on. The horse is attached to the buggy by a set of straps and ropes called reins, that the driver holds onto to steer the horse.
The buggy and horse move together, kind of like when you ride a bike and the pedals make the wheels move. The horse pulls the buggy along the road, just like a car engine powers a car.
People used to use horse and buggies to go on trips, go to work, or just ride around for fun. They didn't go as fast as cars do now, but they were still a good way to get around.
Nowadays, people mostly use cars to get around, but some people still like to ride in horse and buggies for fun or to remind themselves of how people used to travel a long time ago.