.. Getting the ball down

You need some longer tool to bump it down.

There is a mop on the left from the bookshelf. Use the mop on the ball to get it down.

You need something soft underneath it. Look around for those items.

Take three pillows, near the bench, and use them on the ball to make a soft landing.

Now you can use the mop on the ball.

There's a ball holder on the table. Put the ball into it.

You can now access the Mother folder in the terminal.