Kalanchoe "Mexican Hat" - This unique plant reproduces by making "babies" that appear around the edges of each leaf, which can be gently pulled off and replanted. They will also fall off on their own and will continue to grow.
String of Pearls Plant (Senecio Rowleyanus) I love these.A friend gave me a string of pearls plant several years ago. Mine got somekind of disease and I lost it. Haven't been able to find another since.
22 Insanely Cool Conversation-Piece Plants For Your Garden