Introduction: Psychedelic Milk

Picture of Psychedelic Milk

Now I know what you're thinking, and no, it's not that kind of milk. This psychedelic milk is a fun and simple science experiment that is easy to do and whose visual results may just be even more mesmerizing than a campfire.

(Although come to think of it, doing this experiment would probably pair well with that other psychedelic...)

The great thing about this fun bit of science, is that you probably already have everything you need to try it at home!

Let's get to making >>>


Step 1: Supplies

Picture of Supplies
  • whole milk
  • liquid food coloring
  • liquid dish soap
  • powdered dishwasher soap
  • small plates
  • q-tips
  • tiny rocks
  • tweezers

How the Science Works

When you add soap to whole milk, the surface tension is broken causing an initial burst of movement, and then the soap molecules start bonding to the fats and proteins in the milk, causing even more movement. The food coloring we add to the milk doesn't play any role in the science of that 'liquid dance', but it does a great job of illustrating the movement.

You can keep adding soap to create more changes in the movement/color patterns until all the bonding has occurred. After the bonding is done, adding more soap will have no effect. It differs from try to try, but the bonding process takes anywhere from 3-5 minutes if your dish is approx. 4" in diameter.

I've attached a printable experiment note taking sheet that will allow you (or your kids) to keep track of what you've tried (different: dish diameter, soap application, amounts of color) and how awesome each one was (1-5 stars). Use colored pencils/markers to indicate where you tried putting drops of food coloring. (like pictured)

Why This Experiment is Awesome

1. Like snowflakes, each time you do this, you will get completely unique results.
2. It's a super low maintenance way to keep kids (and big kids) busy for hours.
3. It has the potential to get kids really excited about science = future doctors.
4. Because, science is rad. Simple as that.

Step 2: Milk It

Picture of Milk It

Fill the bottom of a small dish/plate* with whole milk** until it's 1/4 to 1/3" deep.

*Try using different sizes of plates to see if having more milk/surface area produces different results.
**It's important to use whole milk because it's the fat in the milk that bonds with the soap, creating the movement. Using 2% or skim milk will produce less exciting results.

Step 3: Drop It

Picture of Drop It

Add 1-2 drops of 3-4 different colors of food coloring in the center of your milk.

FOR MORE FUN: Try the experiment a few more times, putting the colors in different areas of the milk to see how that changes the coloring food dance party.

Step 4: Soap Application #1: Drop(s) of Liquid Dish Soap

Picture of Soap Application #1: Drop(s) of Liquid Dish Soap

Place your food coloring drops and add a drop or two of liquid dish soap to the center of the dish.

Watch the magic happen. I mean science.

Step 5: Soap Application #2: Liquid Dish Soap on a Q-Tip

Picture of Soap Application #2: Liquid Dish Soap on a Q-Tip

Once again, add the food coloring in the center of the milk. Dip a q-tip in liquid dish washing soap and place it in the center of the milk. Hold it there for a few seconds.

If you'd like to add some swirly fun into the mix, twirl the q-tip slowly before taking it out of the milk.

Step 6: Soap Application #3: Sprinkled Dishwashing Powder

Picture of Soap Application #3: Sprinkled Dishwashing Powder

Repeat the color drops process and then scatter a pinch of powdered dish soap over the surface of the milk.

See how different the movement of the color is from the liquid drops.

Step 7: Soap Application #4: Tiny Rock Dipped in Liquid Dish Soap

Picture of Soap Application #4: Tiny Rock Dipped in Liquid Dish Soap

Add the food coloring to the milk. Pick up a very tiny rock with a pair of tweezers, dip the rock in liquid dish washing soap and drop it into the center of the milk. It will sink and continue to release soap creating it's own style of color movement.

Yay, that's it! I hope you have fun trying this.

If you have any other suggestions of different ways to do this experiment, please leave a comment below.

Happy science making!

Comments

batery99 (author)2015-04-16

reminds me clockwork orange lol

dtaghawi-nejad (author)2015-04-05

Any chance to replace the milk with something not from an animal origin?

patsheldon (author)2015-03-26

Great idea! Will use in my class! Thanks for the share!

lsutton3 (author)2015-03-26

I mean if not

lsutton3 (author)2015-03-26

Can you drink this stuff ? If so jk

3DigitalCooks. (author)2015-03-25

Loving this experiment! Do you think it would be possible to find a similar effect using any other food edible "thing" instead of soap? i am thinking about alcohol maybe? but that doesnot make it kid friendly neither :S
Thank you!

I doubt there is anything that both breaks the surface tension and bonds to the fat. You might find something that does one or the other, but that would lessen the effect.

XTL (author)2015-03-26

Can you dip paper in after and make a transfer onto paper and lock it in somehow ?

Like those oil paintings from SA.

Tasha78 (author)2015-03-26

Good

dirtspicy (author)2015-03-26

Its ideal :)

quickspotty (author)2015-03-26

Superior

Raitis (author)2015-03-25

Similarly as 3DigitalCooks I wonder if there is a way to get a similar effect using only edible ingredients?

wimprascal (author)2015-03-25

Thats fascinating...

Wired_Mist (author)2015-03-25

Totally Forgot about this one ! I remember this from a Diy Science kit when i was a Kid ! Thanks for the Flash-Back :D And Nice Photo`s !

Have you tried playing around with different Temperatures? Like warming or cooling something like a marble and dropping it in before the food Coloring?

babygirlxoxoxo (author)2015-03-25

I have done that before

Stefano DV (author)2015-03-25

Really amazing !!

About This Instructable

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Bio: Made in Canada, I grew up crafting, making, and baking. Out of this love for designing and creating, I pursued a BFA in product design ... More »
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