N. levis levis love to dig, so ensure that you have plenty of sand in the bottom of your tank. Feeding for hatchlings is approx 3 or 4 smallish crickets each, roughly every second day but this can vary.
I include a small dish of water for mine, but misting once or twice a week (especially against the glass or rocks, etc, so that they can lap it) is also recommended.
Ensure that the geckos have a safe place to hide (mine also have a fake tunnel system which is placed against the glass so that they can hide, yet I can still view them without disturbing them).
Heating can be provided if you feel they require it (especially if they are younger animals). Mine also have UV during the day for approx. 6 hours, but I dont know if they have ever used it.
Make sure their enclosure is not in direct sun as this may 'cook' them during the heat of the day (obviously, use your own common sense on this).
Have I covered all the basics here?
Anyone else care to add?
cheers,