How to make Oobleck Dance ~ Science Experiments
My kids love trying new Science Experiments, and play recipes. Today we decided to combine the 2 and try to make our Oobleck dance using sound waves. If you have never made it before, Oobleck is a mixture of cornstarch and water. When played with fast it acts like a solid…when allowed to relax it acts like a liquid.
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When we saw a few youtube videos that involved Dancing Oobleck, we decided we needed to take our gooey play to the next level.
Dancing Oobleck Recipe
You will need to make your Oobleck thicker than usual.
- About 2 cups of Corn Starch to 1 cup of water.
Once your recipe is ready let the kids play for a bit while you set up the next step.
- a Subwoofer
- a thin metal cookie sheet
- a MP3 of an audio test tone ~ you will have to play a bit to see what works best with your equipment.
- Food Coloring
- Place the cookie sheet onto the speaker of the sub, and pour in the Oobleck.
- You can download different test tones and play to see what works best for you. We used 40 Hz, 50 Hz, and 63 Hz, and found that we needed to turn the volume way up. We tried a number of different frequencies but these three seemed to work the best. We did a search for subwoofer test MP3. There are a number of different sites that you can use.
- Before you play the MP3 you will need to place your fingers on the edge of the cookie sheet with gentle pressure. It took a bit of playing to see what worked the best, but the results were amazing.
We decided to add food coloring to see what would happen. I love how the colors dance together and you can see all the layers of each color. This was the kids favorite part!
Here are a couple options for subwoofer tests although if you do a search for subwoofer test MP3 or MP3 of an audio test tone.
Tips and Tricks:
- A thicker consistency of Oobleck works best. Although with that said you don’t want it too thick. We used a ratio of 2:1 (cornstarch to water).
- If your oobleck is not dancing, you may need to change the volume on your subwoofer. You can also try digging your finger in Oobleck to start the movement. In the video the kids do it a few times just to get everything started.
- Keep experimenting until you get it to work. Honestly we played around for a bit until it worked for us. Everyone will be working with different equipment so what worked for us might be a little different for you.
After we were all done I let the kids play with the colored Oobleck. They loved it, but a word of caution if stained colored fingers are not your thing. We giggled at the kids as they tried to wash the color off. I’m sure they will be sporting grey blue hands for a few days.