Put a ruler on your head and stand on one leg!
ruler
Touch the window in 5 seconds!
window
It's a pencil.
A
It's a pen.
B
It's a bag.
A
It's a desk.
B
It's a cupboard.
B
It's a pencil case.
A
It's a rubber.
A
Put a book on your head in 5 seconds!
book