Fun story: my older brother (25) learned-ish how to water marble... he got to about the second ring and then left the table and let it dry haha!! He was amazed at how it spread! When the first drop spread, he got all excited and was like, "What do I do now, what do I do??" He ended up choosing a color that was iridescent and when it spread he said "this one is oily so it probably wont work, right?" hahah boys.