Not as far as I know. The closest I can think of is Josh Tenenbaum and Noah Goodman's online book "Probabilistic Models of Cognition", https://probmods.org, which has lots of examples of simple models, written in Church; these could be a good set of exercises to try translating into Figaro. Though these systems are immature enough that there's no guarantee Figaro will actually work on the translated models (or that Church will even work on the originals :-).