Here are some sites on the Web that are at least a bit more fun than watching paint dry
Useful resources
The Internet Archive: a compendium of books, audio recordings, software and old websites.
Wikis
The Audiovisual Identity Database: the world's logos at your fingertips.
Toys
Infinite Mac: emulate Macs from 1984 til 2000 on your broswer.
You Wouldn't Steal a Website
Other cool stuff
Homestar Runner: a webtoon from the 2000s that still holds up well.
Nestflix: in-universe movies and TV shows hidden in your favourite movies and TV shows.
RetroAchievements: earn achievements in your favourite retro games.