It's in the classroom, in front of the tables and chairs
They're pens. They're colorful pens. They are for writing
It's a bag. It's a blue bag. It's for taking things to school
It's a door. It's an orange door
They're in the red pencil case.
It's on the table (We don't use "They" for paper)
It's a ruler. It's a pink ruler
It's a classroom. It's a small classroom.
They're crayons
They're chairs. They're blue chairs. They're for sitting
It's on the bookcase
It's on the red book
They're erasers/ They're rubbers
It's a cupboard. It's a blue cupboard.
it's a crayon. It's a blue crayon. It's for painting pictures