It comes with henna powder and a liquid solution that you pour into the henna bag. That's how you make the paste. Then you squeeze the paste into the applicator bottle and start drawing. Great consistency. Whatever paste you have left can be refrigerated or frozen for later use.
I never did henna before and that kit was very easy to use. I particularly loved the stencils that made it so easy to get the perfect design but I also did a few free handed designs that turned out great!