Fittonias, also known as ‘nerve plants’ are lovely shade plants which are fantastic for terrariums and other indoor uses, also for planting in damp-ish shady areas outside. They love low to medium light. They will go well in a window if not in the hot hot sun (e.g. a window that receives just morning light). They also like high-humidity, which is likely why they thrive in the terrarium environment. Costa Farms and TheSpruce have some great info on them too.
What we most love about these little plants is the many different leaf colours. Fittonias can come with white veins, pink, red, and variations of all of those, and the colours have awesome names like ‘white angel’ and ‘red flame’.