A couple of ideas for typography animations and letter (hover) effects for playful interactions. Anime.js is used to create animations.
Letter by Letter JS is a lightweight jQuery plugin to present text letter by letter on a HTML page. This text can appear as if was just being typed, or it can fade in more gently.
Letter Drop is a jQuery plugin for letter drop animation effect. The plugin takes the text string within the defined element and splits each letter out adding a random delay to each from 1.0 to 1.9 secs before dropping and rotating the letters down like rain.