This article is about the extension. For the device, see EV3.
The image for the Lego Mindstorm EV3 Extension in the Extensions Menu.

The LEGO MINDSTORMS EV3 extension is an extension introduced in Scratch 3.0 that connects an EV3 unit to Scratch. The extension contains four stack blocks, three reporter blocks, three hat blocks, and one Boolean block.

A robot built with the EV3 kit


Note Note: Click a block to learn more about it!

Stage Monitors

Of the four reporter and boolean blocks, the two values Distance and Brightness can have Stage Monitors.


Buttons in the blocks mean they sense movements and/or touch in the sensors connected to the ports, not meaning the brick's buttons.

See Also

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