First of all in order to get things for your Club Penguin house you have to be a member. If you are a member then ther is a funiture catalouge in your igloo on the corner of the screen. You can get all kinds of things from it but it changes every month so the clam might not always be in there.
at the stage
the light house
yes of course
you go to your penguin's house then you see a picture of a house click on it and there you go
by a bigger house
at the light house
you can't
your house and you can also mute the music in club penguin settings
go to your home and start building
the light house is where the beacon is
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in the lite house