It is in a gerbil's nature to sleep alot. Although they are not strictly nocturnal, they can be as active in the day as they are in the night.

They live in the desert.

For the safety of the gerbil, you should only hold the babies after they open their eyes. At this time, they are more mobile and should be picking up new scents. If you pick them up at a younger stage, the parents may think your scent is that of a predator and they will kill and eat the baby.

Like if you intruduce a baby gerbil to a female and a male gerbil they might be nice to him but the male gerbil might play fight or fight in the cage i do not think if you leave the baby gerbil in the same cage with the male gerbil or a female gerbil the female gerbil migt fight or play fight with the baby gerbil if u do please be real care full because if the male gerbil no that the babby gerbil if its a baby girl gerbil yhey will mate or if u do the same with the adult female gerbil they mate to with a baby boy gerbil or adult gerbil will mate to and also mate means that the female gerbil have babbies with the male gerbils .

a gerbil is called a gerbil