Measure out the Kool Aid powder and sugar, and add them to a pitcher.
Pour in cold water and stir well until the powder and sugar are completely dissolved, creating a vibrant flavored liquid.
Fill a blender halfway with crushed ice, then pour the Kool Aid mixture over the ice.
Secure the lid on the blender and blend on high until the mixture is smooth, slushy, and frosty about 30-45 seconds.
Pour the blended slushie into glasses, allowing the icy, colorful mixture to fill each cup.
Serve immediately with a straw or spoon, enjoying the cold, tangy crunch of this nostalgic summer treat.