Replace a pantry door with a screen door! For an even bigger impact, paint it a cheerful hue (try Byte Blue by Sherwin-Williams). The small surface area requires only a sample-size pot of paint to get the job done.
Fix It Yourself and Save|Six projects you can do around the house for a fraction of the cost of a pro. Remember fixing screens as a kid with my dad! Totally forgot about that... need to do this to the screen door!