Fenestaria aurantiaca - Baby toes
This adorable plant is native to Namibia. It's common name is Baby Toes (bit cute, bit weird). In the wild the only part that is above the soil and visible is the very top of the leaf with small semi transparent windows that allows the sun to penetrate it.
How to take care of Fenestaria:
Light: Direct sunlight.
Watering: Let the soil dry completely then wait a bit longer and then little longer still before watering again. Water almost not at all in wintertime
Height: approx. 12cm