Mother of Thousands (Bryophyllum daigremontianum) isn't easy to find, but when you do, it's fun. An annual succulent, the plant is viviparous, meaning that it forms little plantlets along the leaf edge which fall to the soil and, when able to survive on their own, take root. Susceptible to frost, it's usually grown as a houseplant but can be taken outdoors in summer, where it prefers bright shade. Note: Plants of several other species are also known by the common name Mother of Thousands. Caution: Though fun, the plant is poisonous and should be avoided where pets and small children are present.