“The larger the island of knowledge, the longer the shoreline of wonder.” Ralph M. Sockman
Some science experiments are like magic. Some are like art.
Want to try the top one? Fill a glass halfway with water. Add an inch of oil. Add one drop of food colouring. Sprinkle salt on top. Density = gasps of awe.
The bottom one is red cabbage water (shred it, boil it, strain it) and add it to a base, a neutral, and an acid.
(here: baking soda and water, water, vinegar) pH = smiles of wonder
“The larger the island of knowledge, the longer the shoreline of wonder.” Ralph M. Sockman
Handmade Homeschool 
We’ve done the top one and other similar ones, but not the cabbage one. Yet. Although we did dye eggs with red cabbage this year.
Thanks for sharing this.
That sounds simple enough. We’ve been having some duds in the science experiment department lately. Thanks for a couple I can handle.
Try ammonia with your red cabbage indicator.
Also, make a baking soda solution and a vinegar solution, adding enough indicator to get the color changes. Put the baking soda solution in a tall clear container, then slowly add (outside is best!) the vinegar solution.
You might want to see if the kids and you can predict what will happen when you mix the solutions.
You can also make pH test strips with this solution. Soak some coffee filters in the red cabbage juice for a few hours, then take them out and dry. When dry, cut into strips.
Lots of fun to be had with red cabbage juice. 🙂
I really enjoyed this post. Lovely science art. Thanks!