Coffea Arabica is easy to grow indoors, makes a very attractive houseplant and if it likes you well enough, it will even rewards you with flowers and berries!
Ptilotus exaltus var. exaltatus (also Pink Mulla Mulla) is one of the largest mulla mullas. This ephemeral in a good season grows to 1.5m tall, though in poor years it may be only a few cm tall. There is a basal rosette of spathulate-oblanceolate smooth leaves up to 10 cm long, the stem leaves being shorter.
Grow your own Coffee, will take approx 4 years for first harvest. It is actually very easy to grow, indoors. This is surely worth a try for something different.