You have already got a lot of suggestions, you should consider all and find out appropriate one.But before taking any decision you must consult with some interior decorator to get the best ideas.
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Basement Remodeling Contractor
First of all measure the dimensions of room and divide according to their needs.
Choose the walls color and toys according to their genders.You can search online too.
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Basement Finishing Contractor
You have already got a lot of ideas but according to me you should use glass doors or some fine quality curtains.But it is your choice consider all the ideas and pick suitable one.
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Bathroom Renovation Contractor
First of all make sure that walls are not low bearing walls and for any kind of changes you can consider with some interior designer or home decorator.
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Bathroom Remodeling Contractor