TREES!

var treeMaker = function(value){
  //tree code goes here!
  var tree = Object.create(treeMaker.methods);
  tree.value = value || null;
  tree.children = [];
  return tree;
};

//methods go here!

treeMaker.methods = {};

treeMaker.methods.addChild = function(value){
	var node = treeMaker(value);
	this.children.push(node);
};

treeMaker.methods.contains = function(value){
	var currentNode = this;
	var queue = [];
	while(currentNode){
		if(currentNode.value === value){
			return true;
		}
		for (var i = 0; i < currentNode.children.length; i++) {
			queue.push(currentNode.children[i]);
		}
		currentNode = queue.shift();
	}
	return false;
};