In order to have my kids retain what is cause and effect, I had them do skits. After the skits they had to point out the cause and effects that occurred in their little skit...
So - of course, one skit is how a girl falls when she's playing tag and her mom put "oxygen water" to clean up her scraped knee.
Not only do they now know how to identify cause and effect, but they aslo know that agua oxigenada is not oxygen water, but hydrogen peroxide!
I thought that was super, super cute!! :o)