Spider Plant is one of the easiest houseplants to care for. Thrives best in low to minimal light and biweekly watering. Spider takes toxins and converts them to oxygen. Its an old standby but try dressing it up in an urn or letting it hang over a bookcase
Elephant Ear and Asparagus Fern make a great plant combination for a container garden-and they're both easy to grow! I know the asparagus fern is easy to grow inside, but need to look up other (Longwood- always worth the trip).