Как во множественном числе будет слово child

we have become more dependent on chemicals.  and, strangely, we hardly notice anymore. every single day we start and finish by using a product that has at least 10 different chemicals in it: a toothpaste. later, we take a shower using several products (shampoo, conditioner, body wash, lotion). the names of the chemicals in all these products will take a few pages to list. later on, we eat chemically enhanced food, packaged in plastic.  we wear and sleep on synthetics, we drink and eat foods that are drastically modified with chemicals.  all these innovations have been introduced less than 50 years ago, just two generations have been around so many chemicals lately.  and, scarily enough, we hardly notice anymore.

his flat is in a new house. there are three rooms in the flat.  the living-room is the largest of all. it is a nice light room. there are pictures on the walls. there is a round table in  the middle of  the room. there is  a sofa at  the wall with large thick carpet in front of it. a study and a bedroom are small, but very comfortable.