.. Opening the window

Look at the electric box right from the window.

Maybe you could fiddle with the clock to open the windows.

Move the hands of the clock to open the window.

She needs some help to reach the clock.

Use the barrel. While on the barrel move it to the clock and use it.

Talk to the cat about this.

The cat said the windows open automatically at 6:05. You have to talk to the cat so that Reny knows the correct time.