Selecting Watson from the list of starter kits offered opens the Build with Watson page, the upper portion of which is shown in the following screenshot: 

This page is organized into sections, namely Overview, Starter Kits, Watson Services, Developer Resources, and Apps. If you click on Watson Services, then Browse Services, the current Watson-related services that are offered are presented as panels, as shown in the following screenshot: 

At this point, we need to find a service instance we want to use. To select a service offering, you can click on the panel that you are interested in (for example, Machine Learning). To make sure that this is the offering you want, you can click on Details and read through the service description, including its features list and other relevant information (as shown in the following screenshot) before clicking on Create: