Yould make some cardboard nesting boxes, starting with coardboard boxes about 12" cubed or maybe a little bigger -- just glue or tape the top together and cut a circular hole about 10" in diameter in the narrower end. Add some bedding and maybe a fake egg, and they are ready to go. My hens love...
Here are several more possibilities:
Cage cups,
Vertical nipple waterers mounted on the bottom of small plastic bottles (or in the cap with the bottle upside down),
and small hanging bottle waterers like this.