1 whole plant in stock, many small pieces available.
The jelly-bean plant is or should be well-known to all children and parents. Easy to propagate, each jelly-bean-shaped leaf will develop roots if left on compost for a few weeks. The downside is that the adult plants are very fragile, with bits dropping off every time they are moved.
A great plant to grow undisturbed if you want its Fibonacci-sequenced leaves to look good, or fantastic to teach kids about vegetative propagation. Full sun and not too much water.