If your little one loves colorful sensory activities, this is definitely one to try this autumn.
With just a few kitchen ingredients and a little branch we picked up outside, my toddler created a beautiful autumn tree filled with colorful “leaves.” He loved carefully adding each drop and watching the colors float in the oil. It almost looked like magic!
One of my favorite things about this activity is that there’s no right or wrong way to do it. Your child can explore at their own pace, experiment with different colors, and simply enjoy the process of creating. Those are often the activities that keep little ones engaged the longest.
So if you’re looking for an easy fall activity that combines a little science, a little art, and lots of fun, I think your toddler will love this one just as much as mine did. 🍂
Why You’ll Love This Milk and Oil Experiment
- Quick to set up in under 10 minutes
- Uses simple household ingredients
- Encourages creativity and curiosity
- Introduces an easy science concept
- Great for toddlers and preschoolers
- Beautiful enough to display before cleaning up
Materials
- Vegetable oil
- Milk
- Liquid food coloring (yellow, orange, red, and green work perfectly for fall)
- A shallow white plate or tray
- Small cups
- Pipette, dropper, or teaspoon
- One small tree branch collected outside
More Fun Science Experiments to Try
If your toddler loved watching the colorful drops float in this activity, they’ll have just as much fun with my Oil and Water Experiment. It explores another fascinating science concept as vibrant colors dance and separate in water, making it a perfect follow-up for little scientists who enjoy simple, hands-on experiments.
How to Set Up the Milk and Oil Experiment
Step 1: Collect a Branch
Before we started, we went outside together and picked a small tree branch from the garden.
My toddler was excited because he knew it would become the trunk of our autumn tree.
Place the branch in the center of a shallow white plate.
Step 2: Pour in the Oil
Carefully pour a thin layer of vegetable oil into the plate until the bottom is covered.
The oil creates the perfect surface for the colorful drops to float.
Step 3: Make the Color Mixture
In several small cups, add a little milk.
Then mix a few drops of food coloring into each cup until you have bright fall colors like:
- Red
- Orange
- Yellow
- Green
Step 4: Create the Autumn Leaves
Invite your toddler to use a pipette, dropper, or small spoon to drip the colored milk into the oil.
Almost instantly, the colorful drops form beautiful circles floating on top of the oil.
As more colors are added, they begin to resemble vibrant autumn leaves surrounding the tree branch.
Step 5: Keep Exploring
There isn’t a right or wrong way to do this activity.
Let your toddler:
- Make tiny drops
- Create giant colorful circles
- Add different colors
- Watch how the drops stay separate
- Fill the entire tree with colorful “leaves”
Every tree turns out unique.
The Science Behind the Milk and Oil Experiment
This activity introduces a simple science concept in a way toddlers can easily observe.
Oil and milk have different properties, so they don’t mix together. Because the oil is less dense than the milk mixture, the colorful drops stay separate instead of blending into the oil.
Children may not understand the science yet, but they love noticing that the colorful circles float instead of disappearing.
It’s a wonderful first introduction to scientific observation through play.
Skills This Activity Builds
This simple activity supports many early learning skills, including:
- Fine motor skills
- Hand-eye coordination
- Creativity
- Color recognition
- Scientific observation
- Concentration
- Sensory exploration
Frequently Asked Questions
Why don’t the milk and oil mix?
Oil and milk have different properties, so they naturally separate. This lets the colorful milk drops stay visible on top of the oil instead of blending together.
Can I use water instead of milk?
For this version of the activity, milk helps create the colorful droplets that resemble autumn leaves. Water will behave differently and won’t produce the same effect.
Can preschoolers do this activity?
Yes! It’s a fun, hands-on activity for both toddlers and preschoolers. Younger children may enjoy simply adding the drops, while older children can make observations and ask questions about what they see.
Can we make this activity for another season?
Absolutely! Try green shades for spring, bright colors for summer, or blues and whites for a winter-inspired tree.
