What are they?
They're paints.
What is it?
It's (coloured) paper.
What is it?
It's a pen.
What is it?
It's a pencil case.
What are they?
They're coloured pencils.
What is it?
It's a rubbish bin/ trash can.
What is it?
It's a ruler.
What are they?
They're scissors.
What is it?
It's a sharpener.
What is he?
He's a pupil/student
What is it?
It's a clock.
What is he?
He's a teacher.
