Three Tinkering Tailors
Notice the sounds
Begin three with /θ/, then switch to /t/ at the start of tinkering, tailors, totally and tired. Keep the /t/ starts light and clear.
Words in this expression
Source
Games for All Occasions, Mary E. Blain (1909), Tongue TwistersPublic domain in the United States; the pinned source includes the Project Gutenberg license.