This is an easy little experiment you could do with your kid. All you need is two clear containers, two tablespoons of baking soda, water, a piece of string long enough to be dipped end to end into the two containers and a handmade sign (optional).
Fill each container with water as per the picture. Add one tablespoon of baking soda into each. Put one end of the string into one container and the other end into the other container. That's it. Then you let the whole setup sit for two days without moving the content, hence the sign.
We're still on day 1. At the end of day two, you'll see spikes on the string. The water is attracted to the string because it is dry. It'll bring the baking soda with it as it soaks higher up the string. The baking soda collects in clumps or spikes. Cool, right?
While we're on the subject of scientific theory, Angelica came up with one today at the playground. This is how it went down.
Angelica: Mommy, you know you're not supposed to talk and cry at the same time?
Me in my thoughts: Wow! This is cool! She is one mature little girl.
Angelica: You shouldn't talk first. Just cry.
Me in my thoughts: She must mean to let out the emotion first and then to vocalise it. I'm so proud.
Angelica: Because if you cry first, then you get your way. No need to talk.
Well done, me! Well done! Now excuse me while I go and slap myself silly.