Easy Stem Projects for 4th Graders

Evelyn Aug 08, 2026

Nurturing young scientists begins at home and in the classroom, with engaging and accessible science, technology, engineering, and mathematics (STEM) projects. For 4th graders, it's essential to make these projects simple, fun, and hands-on. Let's explore some easy and exciting STEM projects perfect for your little learners.

Save Fred
Save Fred

Engaging 4th graders in STEM activities helps foster a love for science and sets them up for future success. These projects, aligned with common core standards, cater to various learning styles and cater to different interests, ensuring every child finds something they love.

no prep stem activities using paper for kids to do with their homeschool students
no prep stem activities using paper for kids to do with their homeschool students

Easy Science Experiments

Starting with science experiments allows 4th graders to explore the world around them through observation, prediction, and experimentation.

Save Fred STEM Activity: Fun Team-Building Challenge
Save Fred STEM Activity: Fun Team-Building Challenge

Science is all about discovery, and these hands-on experiments ensure a fun and educational experience for all.

Dancing Raisins

STEM Activities
STEM Activities

This fascinating experiment demonstrates the process of osmosis in action. All you need is clear soda, water, and raisins. Observing the raisins "dance" as the soda's carbonation seeps out will captivate your students.

To make this STEM project more engaging, have students predict what will happen before conducting the experiment and then compare their predictions to the actual results.

Colorful Lava Lamp

STEM Toy Penny Spinners: Easy 20-Minute Kids Craft
STEM Toy Penny Spinners: Easy 20-Minute Kids Craft

Creating a lava lamp at home is an exciting way to introduce the concept of density. Using water, vegetable oil, food coloring, and effervescent tablets, students can watch as colors mix and separate in a mesmerizing display.

Encourage students to brainstorm other materials that could be used to create a similar effect, fostering critical thinking and creativity.

DIY Engineering Projects

paper helicopters are an easy activity for kids
paper helicopters are an easy activity for kids

Engineering projects let kids put their design, problem-solving, and building skills to the test. These hands-on activities help develop creativity and resilience as students create, test, and tweak their designs.

Empowering 4th graders with real-world challenges encourages them to think like engineers and fosters a growth mindset.

Marshmallow Bridge Challenge STEM For Kids
Marshmallow Bridge Challenge STEM For Kids
Easy DIY Robotic Hand for Kids
Easy DIY Robotic Hand for Kids
STEM Toy: Penny Spinners
STEM Toy: Penny Spinners
Hurricane STEM Challenge
Hurricane STEM Challenge
How to Make Drawings Float on Water (Easy STEM Trick)
How to Make Drawings Float on Water (Easy STEM Trick)
Easy Baking Soda Growing Tree: A Fun Kids Science Project for Rainy Days
Easy Baking Soda Growing Tree: A Fun Kids Science Project for Rainy Days
a cardboard box filled with lots of little orange sticks on top of a wooden table
a cardboard box filled with lots of little orange sticks on top of a wooden table
5 Engineering Challenges with Clothespins, Binder Clips, and Craft Sticks - Frugal Fun For Boys and Girls
5 Engineering Challenges with Clothespins, Binder Clips, and Craft Sticks - Frugal Fun For Boys and Girls
Popsicle Stick Catapult
Popsicle Stick Catapult
Make Your Own Wind Anemometer | There's Just One Mommy
Make Your Own Wind Anemometer | There's Just One Mommy
Easy STEM Maze in a Baggie for Elementary Kids
Easy STEM Maze in a Baggie for Elementary Kids
Straw Rockets STEM Kids' Craft - Backyard Summer Camp
Straw Rockets STEM Kids' Craft - Backyard Summer Camp
14 Fun STEM Activities with Popsicle Sticks
14 Fun STEM Activities with Popsicle Sticks
FREE STEM Foosball Challenge
FREE STEM Foosball Challenge
How To Build A Balloon Rocket That Actually Flies
How To Build A Balloon Rocket That Actually Flies
Easy Erupting Lemon Volcano Science Experiment for Kids
Easy Erupting Lemon Volcano Science Experiment for Kids
DIY Flying Rocket🚀
DIY Flying Rocket🚀
Paper Plate Roller Coaster STEM Challenge Kids Get Obsessed With
Paper Plate Roller Coaster STEM Challenge Kids Get Obsessed With
Easy Halloween STEM Challenges for Kids
Easy Halloween STEM Challenges for Kids
Build The Tower STEM Activity
Build The Tower STEM Activity

Cardboard Automata

Using simple household items like cardboard, string, and paper clips, students can create intricate moving sculptures known as automata. This project introduces the basics of mechanical movement and encourages artistic expression.

Challenge students to design automata that tell a story or demonstrate a specific action, promoting storytelling and narrative skills alongside engineering principles.

Paper Bridge Challenge

The paper bridge challenge encourages students to work together to build the strongest bridge possible using only paper and tape. This collaborative project promotes teamwork and teaches basic principles of engineering and architecture.

To make this activity more engaging, schedule a friendly competition between different teams in the class, or even across classes, to see who can build the most robust bridge.

Fun Math Games

Math games make learning numbers and operations engaging and enjoyable. These activities introduce essential math concepts while fostering a love for math in your fourth-graders.

Incorporating games into your classroom curriculum also helps develop critical thinking, problem-solving, and sportsmanship skills.

Dot Day

Dot Day, held annually on September 15th, celebrates creativity, courage, and collaboration. Encourage students to express their unique styles and emotions through a canvas of dots, which can be used to explore fractions, geometry, and measurement concepts.

As students create their dot art, discuss different fraction representations, such as part-to-whole and part-to-part models, and encourage them to consider the mathematical relationship between their chosen colors and shapes.

Mystery Number Game

The Mystery Number game is a fun and interactive way for students to practice addition, subtraction, or multiplication. One student thinks of a number, and others ask yes-or-no questions to determine what the number is.

To extend this activity, have students create their own Mystery Number challenges, promoting mathematical reasoning, logical thinking, and creative problem-solving.

Watching your fourth-graders light up as they explore, create, and learn through these engaging STEM projects is an incredible experience. Remember, the objective is to make learning fun and exciting for them. With these hands-on activities, you'll ignite their curiosity and foster a lifelong love for STEM.