Little Alchemy Unblocked -

Air, Earth, Fire, and Water

Little Alchemy Unblocked is a widely popular browser-based puzzle game that challenges players to combine fundamental elements to create a vast library of complex items. Initially released in 2010, the game has evolved from its humble beginnings of four basic elements——into a creative powerhouse with over 580 unique combinations. Core Gameplay & Experience

If you want, I can:

Little Alchemy Unblocked: The Ultimate Guide to Playing the Classic Crafting Game Anywhere

You might wonder: Why would anyone block a game about chemistry and discovery? little alchemy unblocked

For educators/admins considering deployment:

Official site

(may be blocked):