When you drag the Aged WIP option from the Toolbox, a bar chart of the current WIP is displayed.
Right-click the display to display the pop-up menu. From this menu you can select various sort and display options. You can also change the date up to which the WIP is shown by changing the selection in the date list box in the bottom left corner.
Note that the security group you belong to dictates whether or not you will see this bar chart.