And the queen of bizzare,
Stapelia schingii var. Angolensis. Water in the winter will kill it, but it likes a good watering once per month in hot weather. The purple metalic frillies look to other flies like a bunch of their friends settling down for a feast on a dead animal, so both the color, movement and smell work together to attract pollinators. Perhaps some evolutionist can explain that one to me...
And an easy grower for those with kids. The Sensitive Plant,
Mimosa pudica. It's attractive, lives for years, and kids just love it. You touch the leaves, and the really quickly fold downwards. One of the quickest movements in the plant world.