they are adorable. Where are they? if up high in a nest box you might want to move mama hen and ducklings down to the floor but fence them off from the rest of the flock temporally for their protection Put out chick feed if that is what you plan to feed them it's okay for mom too. and something along this line for water except with 8 plus mom you'll need more than 1 but these work good for ducklings
Just don't cut the hole too large you don't want the ducklings to be able to get in.
Other than that let mom do the rest.
Over the next few days depending on what your feeding them you will want to get either brewers yeast or nutritional yeast to sprinkle over their feed for needed extra niacin and B vitamins 1 Tab per cup of feed it's okay for mom too.