The Blocks and Stuff mod is a large-scale content expansion for Minecraft, introducing a massive number of custom blocks that focus on advanced technology, complex automation, new materials, and a diverse array of explosive devices.

Key Features

Complex Logic and Automation Systems: Many blocks, often named with seemingly random strings like Jbghgh and Fhxbgftg, are described as being part of a "graphically represented event transmission with delayers" (procedura jest graficznie przedstawionym przesyłem zdarzeń z opóźnialnikami). This indicates a highly customized system for creating sophisticated circuits, timed sequences, and in-game automation that goes beyond the capabilities of standard Redstone.
Technological and Utility Blocks: The mod introduces functional 3D blocks like Tv, Circut, Microwave, and Nokia. These likely act as decorative elements, power sources, or components in the automation system.
New Construction Materials: Blocks such as Fiberglass, Purefiberglass, and Rawlead suggest the addition of new tiers of building materials with unique visual or physical properties.
Diverse Explosives: A significant portion of the mod is dedicated to powerful, unique explosive blocks, including Xyzbomb, Tornadobomb, and various blocks with the -tnt suffix (e.g., Destructiontnt, Nuketnt).
World Generation and Portals: The Combined block and the Oncemistakenastrue block are noted as being generated by volcanic material or tied to a portal. This hints at the inclusion of new, unique world structures, biomes (like Lightplains), or potentially a new dimension to explore.
Unique/Esoteric Elements: Blocks like Happy and Hapyness apply status effects, while Hi is described as a living entity made of scraps possessing intelligence, adding unusual or humorous mechanics to the game.
And many more
Info about updates here:

Update 3.0.1

added 2 music discs

edited LIght plains

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bug fix update 3.0.2

the massive 3.0.3 updete

whats new?

nuke block

the nuke block is a tnt with extreme power

ultratnt

its a tnt but it shoots 200 tnts into the air

levitation block

its a redstone powerd(osc. signal) block with infinite time of levitition

Summary

Blocks and Stuff is an ambitious mod that provides players with extensive tools for technical ingenuity, large-scale construction, and controlled chaos.

blocks and stuffs