Hi, I have problem in the challenge which is as follows : 
Create a Lightning Component to display a single item for your packing list.

• Create a component called campingListItem that displays the name (ui:outputText) and the three custom fields using the appropriate output components.
• Add an attribute named item for type Camping_Item__c that is required.

for this I made component campingListItem.cmp which has following code :

<aura:component>
    <aura:attribute name="item" type="Camping_Item__c" />    
    <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}"/></p>
</aura:component>

but data is not displaying from object simple HTML text is displaying as follows:

Name:
Quantity:
Price:
Packed?:  False

please give me some suggestion.