ChrysN made a nice (and educational) tutorial on how to sew a plush cell including the organelles. I think this would be a great project to make with kids or a good way to remember all your cell parts for a biology test.
You could easily modify this to be a plant cell too, by adding a cell wall, some chloroplasts, and a nice big vacuole (similar to the plant cell brooch I made). I might make one of these as a throw pillow for my couch.
(Via Craft)
(Via Craft)