This was a fun outdoor experiment. The chalk didn't seem to work as well for us as when we did corn starch paintings on the driveway, but Sweet Girl enjoyed spraying from the squirt bottles...(what kid doesn't like squirt bottles???)
I got the directions for mixing our chalk here.
I think ours ended up a little too watery. Once dried, it was pretty light.
If we make this again, I think we would double the mixture so we could have more colors and hopefully more vibrant dried chalk.