hiii,
I m new to Salesforce. My challenge was

Create a Lightning Component to display a single item for your packing list.

• Create a compenent called campingListItem.
• Add an attribute named item for type Camping_Item__c that is required.
• Display the Name, Price, Quanity and Packed status using the appropriate output fields.

After lots of experimentation I found some good results. The result is I can display all the Camping list items with the following code. But my challenge is not yet complete. It is saying....  
"Challenge Not yet complete... here's what's wrong: 
The campingListItem Lightning Component's attribute tag doesn't exist or its attributes are not set correctly."


           campingArrayIteration.cmp
<aura:component controller="CampingListClass" >   
  <h2>Camping List Items</h2>
    <aura:handler name="init" action="{!c.doInit}" value="{!this}"/>   
    <aura:attribute name="campingArray" type="Camping_Item__c[]"/>
                <aura:iteration items="{!v.campingArray}" var="iterationVar">                    
                  <div>                    
                    <c:campingItem item="{!iterationVar}"/>
                  </div>                    
                </aura:iteration>      
</aura:component>


       campingArrayIterationController.js
({       
doInit: function(component, event, helper) {
    var action = component.get("c.getCampingItems");
    action.setCallback(this, function(response) {
        var state = response.getState();
        if (component.isValid() && state === "SUCCESS") {
            component.set("v.campingArray", response.getReturnValue());
        }
        else {  console.log("Failed with state: " + state);  }
    });
    $A.enqueueAction(action);
}    
})


         campingListIteration.cmp
<aura:component >
<aura:attribute name="item" type="Camping_Item__c" />  
    <div><br/>    
       <p>Name:<ui:outputText value="{!v.item.Name}"/></p>    
       <p>Quantity:<ui:outputNumber value="{!v.item.Quantity__c}"/></p>    
       <p>Price:<ui:outputCurrency value="{!v.item.Price__c}"/></p>
       <p>Packed?:<ui:outputCheckbox value="{!v.item.Packed__c}" aura:id="opCB" /></p>
    </div>   
</aura:component>


             CampingListClass.apxc
public with sharing class CampingListClass { 
    @AuraEnabled
    public static List<Camping_Item__c> getCampingItems() {
        return [SELECT Id, Name, Quantity__c, Price__c, Packed__c, 
                        CreatedDate 
                FROM Camping_Item__c];
    }
}


                  this is the result coming with proper checkboxes
Camping List Items
Name:Boys Track Suite
Quantity:15
Price:$1,500.00
Packed?:
Name:Girls Track Suite
Quantity:13
Price:$1,400.00
Packed?:
Name:NCC Boys suite
Quantity:13
Price:$1,900.00
Packed?:
Name:NCC girls suite
Quantity:18
Price:$2,100.00
Packed?:


Can anyone help me in displaying only a single record, i tried a lot but it is not coming, so that i can complete my challenge.
Thanks
Saroj