I was needing to add some interactive check boxes to a Word document, but found out that they only show up in the "Developer" menu, which does not show up by default in Word. To add the "Developer" tab menu, you must follow the following steps:

  1. Click the "File" drop down menu
  2. Click "Options" at the bottom of the menu
  3. Select "Customize Ribbon" on the left side of the dialog box that appears
  4. Choose "Main Tabs" from the "Customize the Ribbon" drop down menu
  5. Check the "Developer" box to enable it:

 

6. Then to add a checkbox, switch to the "Developer" tab and click the checkbox icon: