We use it to write
pencil
pen
what's this?
sharpener
What are these?
Rulers
What's this
Desk
What's this?
table
What's this?
Chair
What's this?
Rubber
What's this?
pencil case
What's this?
Book
What's this?
guitar
What's this?
violin
What's this?
drums
What's this?
piano
