Turtle Talk: by Aptus Speech & Language Therapy. I recently reviewed Keywords Understanding by this same developer. I am more impressed with Turtle Talk. This app is simple in nature but it does the job in a way I think children will respond to and enjoy. This app is designed to help children reduce their rate of speech and pace themselves. However, I would also use this with children whose speech may be too slow.
The app offers a selection of conversation categories. They are: Activities & Cultural Things, Family, Friends & Pets, School, Opinions, More About You, and If Questions. One can also opt for no categories or a random presentation. If a category is selected, a question or topic discussion is written at the top of the screen.