The animation feature of Microsoft PowerPoint gives you granular control over how your presentation looks and acts. Advanced options, such as showing one bullet point at a time or having multiple ...

You can add a timer to your Google Slides presentation by inserting a YouTube video into each slide.

One way to do this is by adding snow to a PowerPoint slide. The article How to make it snow in PowerPoint offers a basic snow plan that uses the same shape and random timing effects.