First time kitten owner( three days old)

My one year old just had two little ones in my closet. I went to check on them this morning( with clean hands) and one little guy had fallen inbetween some clutter with no way to get back up ... I put several towels down in order to fill in any gaps and create a kind of wall for the kittens, placing both in the center. my concern is wether or not i should try to move them and moma or straighten up the closet or just let them be. 

ive also noticed mama cat will be with them the majority of the day but sometimes for an hour or so she will lay in the other room. she is less than a year old herself... is this normal ?

It is normal for mom to leave the kittens while they sleep.

Yes, you should make her a safe nest in the closet. The kittens should be contained in a box that mom is comfortable with, and there should be nothing that they can get behind or under.

Do you plan to have mom spayed?

Yes i do plan on having mom spayed . So today ill take everything out of the bottom of the closet and set up a ( i assume somewhat shallow) box with towels. Is there a recomended brand of food for mama cat ? 

Also because i know someone will want it ... heres a picture

Aww. Blankets are better than towels, as the kittens' claws can catch in the terrycloth and get stuck.

Fancy Feast classic is excellent as the first ingredient is meat or poultry, not by-products.

Very cute! We always like to see photos.

The box can be medium-height. Mom should be able to get in and out easily, but you want the kittens to stay put.

You can also feed her kitten wet and dry food for extra nutrients. A food with meat as the first ingredient is always best.

Mom and babies can all be spayed / neutered when the kittens are 8 weeks old. Mom can get pregnant again any time now, even without a visible heat, so she must stay inside and away from intact males until her spay.