Instead, the best way to tell your Dalmatian puppy off is by saying «no» with a firm yet calm tone of voice. (welovedalmatians.com)
If, however, you use a calm tone of voice and say something like: «I'm really frustrated. (littleheartsbooks.com)
When the child stops acting up and goes back to playing quietly or speaking in a calm tone of voice, be ready with positive reinforcement. (childmind.org)