Club Penguin Island will almost certainly be allowing you to create your own furniture at some point according to HagridCP. He has kindly allowed me to share some code which he found in the app files. It suggests that there will be custom furniture in the future.
Looks like you can make custom igloo furniture. -Hagrid
I think that custom igloo furniture will be amazing to create! If we’re satisfied with what we have at the moment, think about the potential which Club Penguin Island has for igloos! Every single one you visit will be unique and different!
I’d like to give a huge thank you to Hagrid for allowing me to share this!