I have a few small-ish succulents but the smallest have to be these Schlumbergera seedlings. The 'pots' are just discarded K-cups from the office machine...I peeled off the top and punched extra drainage holes in the bottom.
The plants on the left are about 9 months to a year older than the ones on the right (I forget when I planted them, lol). The ones on the left are just starting to get some mature segments.
(And yes, I know these are Thanksgiving cactus and not Christmas cactus. But that was what we always called them, growing up.
)