Today’s playful preschool theme is all about rainbows! I decided to try a little bit of a rainbow melting ice experiment with the kids.
How to Set Up a Melting Ice Experiment
We compared two different experimental styles in a rainbow of color.
Materials we used
Directions for our first melting ice experiment
First! You will need to freeze 2 big blocks of ice. I used a simple plastic lunch box that was in a rectangle shape filled with water and left overnight. Next you will need some food coloring. I used normal liquid color as well as a purple gel coloring because no matter how much I try I can never get my mixes to turn purple!
The rest I was able to mix from the base colors as instructed on the food coloring box which I found in the cake aisle in the local grocery store. You will also need coarse salt.
Take out seven small bowls add half a tablespoon of salt to each and a few drops of coloring then mix. Don’t be shy to use your fingers. Once you have all the colors sprinkle a rainbow on your block of ice.
Yip, love this purple! It comes from this neon set of gel coloring.
We watched for a few minutes as the salt ate away at the ice to produce craters everywhere it touched and the color from the salt went into these craters to look beautiful.
Directions for our second melting ice experiment
Our next part of the ice melting experiment was to see if we could get a better result with some water paints. This idea was inspired by Lalymom from the ebook Fizz, Pop, Bang! Playful Science & Math Activities. Check it out!
So here we salted our ice block with plain salt. It was kind of hard to see the ice making the craters because of the lack of color. THEN we started painting our rainbow with the water paints.
They took nicely and after a few minutes more of melting we were able to see our craters better.
Take a look at that color!
Painting the ice after the salt had been added was definitely a more visual experience versus the color salt.
The run off from this was even a rainbow! There were many ooh ahhs from the kids.
Of course! There was poking too as we needed to feel how the ice had melted. Yip, very rough stuff. Oh and the colors splattered on the shirt below, washed out.
See our other rainbow activities from last week!
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More awesome Rainbow themed ideas!
- Rainbow Letter Formation Sticky Wall by Still Playing School
- Language Activities for Preschoolers: Rainbow Climb by Growing Book by Book
- Rainbow SensoryBin by Tiny Tots Adventures
- Inventing Their Own Songs to Encourage Creativity by Capri + 3
- Rainbow Domino Game by Rainy Day Mum
- Rainbow Patterns with Blocks by Mom Inspired Life
- Scented Rainbow Science and Sensory Play by Fun-A-Day
- Preschool Engineering with Rainbows by Natural Beach Living
- Design a Rainbow Technology Connection by The Educators’ Spin On It
- DisappearingRainbow Colors by Learning to Walk
- Creating Salty Rainbows with Preschoolers by Life Over C’s
- Rainbow Ice and Salt Experiment for Preschool by Powerful Mothering.