These are easy-to-care-for plants that look great and will purify your air.
SPIDER PLANT aka Chlorophytum comosum Best indoor location: In indirect light with humidity Toxic to dogs/cats? NO
DRACAENA varieties: Red-edged dracaena, cornstalk dracaena, Janet Craig, Warneckei
Best indoor location: Brightly filtered light Toxic to dogs/cats? YES
* easiest to care for * POTHOS aka DEVIL'S IVY aka Epipremnum aureum Best indoor location: Bright but indirect light Toxic to dogs/cats? YES
ALOE VERA aka Aloe barbadensis Best indoor location: Bright, indirect light Toxic to dogs/cats? YES
SNAKE PLANT aka Sansevieria trifasciata Best indoor location: Indirect sunlight Toxic to dogs/cats? YES
Source: NASA Clean Air Study https://ntrs.nasa.gov/search.jsp?R=19930072988