Already dreading the holiday break and the endless fight over screentime?
When school is out for the holidays, kids are excited—but that excitement can quickly turn into boredom, especially during long stretches of indoor time. The good news? You don’t need screens, expensive kits, or complicated prep to keep kids learning. With a few everyday materials, you can turn holiday break into a time for curiosity, creativity, and hands-on science fun.
These indoor science activities are perfect for winter break, rainy days, after-school downtime, and homeschool learning.
They encourage critical thinking, observation, and exploration while keeping kids engaged and entertained.
Teacher Tip: These indoor science activities align with NGSS standards and are ideal for K–5 learners during winter break, indoor recess, sub plans, or enrichment activities at home.
This classic activity never gets old—and for good reason. A simple sink or float experiment introduces kids to basic physics concepts like density and buoyancy.
What You’ll Need:
A bowl or container of water and a variety of household objects (spoon, cork, toy car, coin, sponge).
What Kids Learn:
Children make predictions, test their ideas, and record results, building early scientific reasoning skills.
Extension Idea:
Challenge kids to change an object so it floats or sinks differently.
NGSS: K-PS2-1
Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.
NGSS: 2-PS1-1
Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.
Why it Fits:
Students observe how objects behave in water, compare materials, make predictions, and test outcomes—key early physical science practices.
This classic activity never gets old—and for good reason. A simple sink or float experiment introduces kids to basic physics concepts like density and buoyancy.
What You’ll Need:
A bowl or container of water and a variety of household objects (spoon, cork, toy car, coin, sponge).
What Kids Learn:
Children make predictions, test their ideas, and record results, building early scientific reasoning skills.
Extension Idea:
Challenge kids to change an object so it floats or sinks differently.
NGSS: K-PS2-1
Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.
NGSS: 2-PS1-1
Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.
Why it Fits:
Students observe how objects behave in water, compare materials, make predictions, and test outcomes—key early physical science practices.
This colorful science activity feels like a magic trick but teaches real science concepts. It’s always a holiday break favorite.
What You’ll Need:
Clear jar, water, vegetable oil, food coloring, and an effervescent tablet.
What Kids Learn:
Kids explore liquid density and simple chemical reactions as the bubbles rise and fall.
Extension Idea:
Try different colors or compare how fast the reaction happens with warm versus cool water.
NGSS: 2-PS1-1
Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.
NGSS: 5-PS1-4
Conduct an investigation to determine whether the mixing of two or more substances results in new substances.
Why it Fits:
This activity introduces density, immiscible liquids, and simple chemical reactions in an engaging, visual way.
Turn a common household item into a science investigation. This experiment is perfect for introducing scientific testing and data collection.
What You’ll Need:
Different brands of paper towels (or napkins, textures, materials, paper…), water, and a measuring cup.
What Kids Learn:
Children compare absorption rates, practice measuring, and learn how to run a fair test.
Extension Idea:
Create a chart or graph to display results and determine the “best” paper towel.
NGSS: K-2-ETS1-1
Ask questions, make observations, and gather information about a situation people want to change to define a simple problem.
NGSS: 2-PS1-2
Analyze data obtained from testing different materials to determine which materials have the properties best suited for an intended purpose.
Why it Fits:
Students test materials, collect data, compare results, and identify which paper towel performs best—perfect for early engineering and materials science.
Dark winter afternoons are perfect for exploring light and shadows indoors.
What You’ll Need:
A flashlight, lamp, or natural light from a window.
What Kids Learn:
Kids investigate how light travels, how shadows form, and how changing angles affects shadow size.
Extension Idea:
Trace shadows at different times of day and compare results.
NGSS: 1-PS4-2
Make observations to construct an evidence-based account that objects can be seen only when illuminated.
NGSS: 4-PS4-2
Develop a model to describe that light reflecting from objects and entering the eye allows objects to be seen.
Why it Fits:
Children explore light sources, shadow formation, and changes in shadow size through hands-on observation and modeling.
Also, check out my free Sun Dial Activity Download:
Bring the outdoors inside with this calm, hands-on activity that builds foundational science skills.
What You’ll Need:
Leaves, rocks, shells, pinecones, or toy animals.
What Kids Learn:
Children practice observation, comparison, and classification by sorting items by size, color, texture, or shape.
Extension Idea:
Have kids create their own sorting rules and explain their thinking.
NGSS: K-LS1-1
Use observations to describe patterns of what plants and animals need to survive.
NGSS: K-2-ETS1-1
Ask questions, make observations, and gather information about a situation people want to change.
NGSS: 2-LS4-1
Make observations of plants and animals to compare the diversity of life in different habitats.
Why it Fits:
Sorting and classification build foundational life science skills such as observation, comparison, and recognizing patterns in nature.
More Indoor Science Suggestions
Keep it fun and hands-on! Let kids make predictions, test their ideas, and talk about what they observe. Mixing quick experiments with short discussions or drawing time keeps energy high and thinking active.
National Geographic Earth Science Kit – 100+ Science Experiments & Activities for Kids
Crystal Growing, Volcano Science Kit, Rock Collection, STEM Project
Kids Microscope, 1000X Portable Mini Pocket Microscope
Rechargeable, STEM Educational Science Kit
That’s okay! Science is about exploring and asking questions. When an experiment doesn’t go “as expected,” it’s a great opportunity to talk about why and what might change the outcome next time.
Why Indoor Science Activities Matter During Holiday Breaks
Holiday breaks are an important time for kids to relax—but keeping their minds active helps prevent learning loss. Indoor science activities support curiosity, problem-solving, and creativity without feeling like “schoolwork.” They also provide structure during long days at home while encouraging hands-on discovery.
For parents, these activities are easy to set up and use materials you already have. For teachers, they make great enrichment ideas to share with families or send home as optional learning extensions.
Make Holiday Learning Simple and Fun
Science doesn’t have to stop just because school is out. With these five indoor science activities, kids can explore, experiment, and learn—all while having fun indoors.
Looking for printable science activities, nature-inspired learning resources, or low-prep STEM ideas for kids? Be sure to explore our free and classroom-ready resources designed for parents, teachers, and homeschool families.
Frequently Asked Questions about Indoor Science Activities for Kids
Indoor science activities are hands-on experiments and explorations that kids can do inside using common materials. They make learning science fun and engaging—especially during winter break, rainy days, or after school. These activities help children observe, test ideas, and think like young scientists.
Most indoor science activities can be adapted for a wide range of ages, from preschoolers with adult guidance to elementary-aged learners who can record observations and make predictions independently.
No. The best indoor science activities use everyday household items like water, containers, paper towels, flashlights, or simple foods. You don’t need special equipment or expensive kits to create meaningful science learning moments.
Indoor science activities help kids build:
Critical thinking and observation skills
Prediction and hypothesis testing
Measurement and data recording
Creativity and curiosity
These skills are foundational to STEM learning and connect directly to scientific thinking practices.
Yes! They are perfect for homeschool settings, indoor recess, after-school programs, and classroom enrichment. Many activities can be tied to science standards and expanded with journaling, comparison charts, and guided discussion.
I’d Love to Hear From You!
Your feedback helps me create even more tools to support your learners!
Thank you, and have a fantastic week!
-J
creativebrainsgrowhere.org
@creativebrainsgrowhere
You must be logged in to post a comment.