

The quails can easily get through the standard finch mesh you get at bunnings etc. They are roughly the size of an adults thumbnail.
babies will drown in water 1/2 an inch deep.
I buy a big (maybe 20L) plastic storage box from the local $2 shop, put mouse bedding in the bottom, a peanut butter lid with water, and another with finch mix, and a juice bottle lid with egg & biscuit which they will devour.
I also get a large plastic plant pot, turn it upside down, and then cut an arch shaped hole so the quails can go in an out of the pot. it's like a hideaway.