Auntie Alice, a kind and nice lady, opened a nursery in Aberdeen. Two AI robots helped her to look after the nursery and take care of the little children. One robot was called Gogo, another was called Buster.

Gogo was a brave AI robot, and Buster was smart. Together they worked, things finished fast and orderly.  

Gogo and Buster always worked fast. They helped Auntie Alice a lot. She was satisfied with what they did. 

Gogo and Buster also loved the little children in the nursery. They were friendly to them, too. All the children liked to play with the two AI robots.

One evening, a little girl stayed in the nursery until the dark night came because her mother worked overtime that night. She was alone in the nursery since all the other children have already left. Buster and Gogo noticed this and they played and chatted with her so as to make her feel accompanied, safe and warm. The little girl then felt happy.

Suddenly, the little girl cried loudly and said in a panic, "I heard some strange sound. Do you hear it? It's really frightening! I'm very scared!" Buster and Gogo also heard the sound, but they tried to comfort the little girl and cheered her up until her mother came to pick her up.  Buster and Gogo guessed the scary sound was from some unknown objects.

One evening, after all the little children left, Auntie Alice was very thirsty. So, she asked Buster to go to the supermarket and buy her some drinks. On the other hand, Gogo stayed in the nursery to help do the cleaning. 

On the way back to the nursery, Buster saw a scary shadowy thing. It thought it should be a ghost, which looked like a brown wolf. Buster was very scared. It rushed back to the nursery immediately.

I'm scared!

Howl ! I'll eat you!

I saw a ghost, Gogo! It looked like a wolf! 

Mmm...Let me search what a ghost is.  Google said, 'a ghost is the soul or spirit of a dead person or animal.' What you saw should be the soul of the wolf. Ghosts can hurt people.

Buster, we have to destroy the ghosts so that they cannot hurt the little children in our nursery! What do you think?

Yes, we need to destroy them! But...how? How can we do that? We don't know anything about destroying ghosts!

Gogo and Buster, are you two talking about destroying ghosts?

At the same time, Auntie Alice heard what Gogo and Buster said.

Yes, exactly, Auntie Alice! 

But we're wondering how to do it! We have no ideas!

Auntie Alice told Gogo and Buster that she used to be a professional ghostbuster long before she opened the nursery. She knew everything about destroying ghosts well, and she had lots of weapons for destroying ghosts which were hid inside the secret basement of the nursery.

Wow!

I love this basement! It's great! We want some weapons to destroy the ghosts!    

Auntie Alice led Gogo and Buster down to the secret basement and introduced everything they saw in it to them.

All these are my weapons! Please choose the one you like. Then I'll tell you how to destroy the ghosts.

I've already had a powerful gun. I don't need any other more weapons.

I want the long, sharp blade, Auntie Alice. May I have that?

Buster then got this long and sharp blade. It asked Auntie Alice to teach it how to use it.