Parodia magnifica

A cactus must be cool if its botanical name contains magnifica! Balloon cactus doesn't disappoint; this globe-shaped plant has parallel rows of spines running down its sides, giving it fun architecture. It also has yellow flowers. It may grow as much as 12 inches tall (30 cm) in time.

Euphorbia lactea compacta

While it looks like a cactus, candelabra cactus is actually more closely related to poinsettias! It has upright, variegated stems and creates a dramatic look. In time, it can grow 60 inches (150 cm) tall or more.

Opuntia subulata monstrose

Christmas tree cactus is an unusual, upright-growing variety that has thick, branched pads that almost give it a Christmas-tree look. Over time, it can grow 24 inches (60 cm) tall. Note: It's also called Austrocylindropuntia subulata.