Okay, let's imagine a big castle with a big wall all around it. This castle is owned by the Queen of England, Queen Elizabeth. To keep the castle safe, there is a special gate that people have to go through to get inside. This gate is called the Queen Elizabeth Gate.
Think of it like going to a playground with a fence around it. You have to go through a gate to get inside to play. The Queen Elizabeth Gate is like the special gate that people have to go through to get inside the castle.
The gate has the name "Queen Elizabeth" on it because it belongs to the Queen of England. She is very important and in charge of the castle, so her name is on the gate to let people know it's her castle.
Overall, the Queen Elizabeth Gate is just a special gate to keep Queen Elizabeth's castle safe and it has her name on it because she's the Queen and in charge.