In this job we show how you can bind the first select field to populate the second select field, then bind that second select field to populate the text box!
Although this may seem a touch 'meta', it's actually very handy. For example, by doing this we could create a form where the user selects a car make, which populates a car models select item, which in turn populates a year select item.
Please note that in order for this job to work you will need related entries on your fb_demo table.
By related entries we mean you have a one to many relationship between ages and names. In other words, you have more than 1 name with the same age.