The Array object stores multiple values in a single variable:
var fruits = ["Apple", "Banana", "Orange];
console.log(fruits.length);
// 3
To access or pull a Child from an Array, use the following expression (assuming "fruits" above is a Child list):
this.children [ 2 ]
//pulls 2nd Child: Banana
Append to the end of an Array with push:
var newLength = fruits.push("Kiwi");
// ["Apple", "Banana", "Orange", "Kiwi"]
NOTE:
There are a number of Array expressions. See (via external link) https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array