s Katy approached the desk, the rustling got louder and louder. Katy paused as she stood next to the drawer. Was she about to discover an important and fascinating secret?

As she slowly pulled open the drawer, the rustling stopped. Katy peered between the mess of pens, pencil sharpeners, and crumpled tissues, trying to find the mystery resident. Could it be a mouse? It would be easy to understand why a mouse would live amongst the clutter inside Mrs Stuart’s desk. But the two bright eyes staring out at her didn’t look like they belonged to a mouse.

Katy peered in closer to get a better look at the tiny creature. Its scaly skin was green and yellow, and it had huge, fascinated eyes.

‘Hello,’ Katy whispered.

The creature hopped neatly onto Katy’s hand.

‘Hello!’ it replied. ‘I’m Dino – who are you? I've never seen anything like you before. You're a bit like Mrs Stuart, only smaller.’

‘I’m Katy,’ she answered. ‘I’m one of Mrs Stuart’s pupils. There are lots of us. What exactly are you? And why are you in my history teacher’s desk?’

Dino looked up at Katy. ‘I’m a teacher’s pet. I live in Mrs Stuart’s desk to help her out with the history of dinosaurs. I know loads about them – she always asks me if she needs to know something. What are you doing here?'

Katy looked sad for a moment.

‘I have to stay after school because I need extra help with history. It’s my worst subject – it’s so boring.’

Dino looked astonished.

‘No it isn’t! No subject is boring if you learn it in a fun way! Listen, I don’t just have to help Mrs Stuart. I can help you, too! I've got friends who know about all sorts of subjects - even about magic and jokes!’

Katy watched in amazement as Dino hopped down onto the floor and gave a sharp whistle. Suddenly, Katy heard a lot of noise in the corridor. She gasped and ran back to her seat.