Schlumbergera truncata - Thanksgiving Cactus
This is one of the few plants that will bloom indoors, and with spectacular flowers too. Unlike most cactus and succulents this one is actually tropical and prefers a more humid environment. The Thanksgiving cactus will remain in flower for four to six weeks, with each flower lasting six to nine days. It does well indoors or out, just avoid direct sun.
Size varies with the ones I have, white ones are the smallest. Buds fall off very easily and probably won't stay on during shipping. However, they will put out plenty more buds.