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20 hands-on STEM activities for ages 4–8. Download instantly. No prep needed.
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Little Engineers — 20 STEM Activities
Ages 4–8 · Household Items Only
One PDF, 20 ready-to-go experiments. Step-by-step guides parents can read aloud, with the science explained simply.
Volcano Eruption
Baking soda, vinegar, dish soap
Water Rocket
Plastic bottle, water, bike pump
Rainbow Walking Water
Food coloring, water, paper towels
Elephant Toothpaste
Yeast, hydrogen peroxide, dish soap
Magnetic Maze
Magnets, cardboard, paper clip
Invisible Ink Letters
Lemon juice, paper, lamp
Cloud in a Jar
Hot water, ice, hairspray
Dancing Raisins
Raisins, sparkling water, clear glass
Oobleck Slime
Cornstarch, water, food coloring
Paper Bridge Challenge
Paper, tape, pennies
Static Electricity Butterfly
Balloon, tissue paper
Seed Germination Race
Seeds, cotton balls, glass jars
Sound & Vibrations
Bowl, plastic wrap, salt, spoon
Floating Egg Experiment
Egg, salt, water, tall glass
Chromatography Art
Coffee filters, markers, water
Spaghetti Tower
Spaghetti, marshmallows
Milk Plastic Shapes
Milk, vinegar, microwave-safe bowl
DIY Kaleidoscope
Cardboard tube, mirrors, colored beads
Solar Oven S'mores
Pizza box, foil, plastic wrap, chocolate
DIY Compass
Needle, magnet, cork, bowl of water
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Created by certified teachers and child development specialists. Evidence-based, age-appropriate.
What parents are saying
Real reviews from real families
“My 5-year-old asked to do the volcano 4 nights in a row. This guide is pure gold.”
Sarah M.
Mom of 2, Portland
“Finally something that gets them OFF screens and makes them actually think. Water experiments were a massive hit.”
James T.
Homeschool dad, Austin
“I was skeptical but my 7-year-old built a working compass. She was SO proud of herself.”
Marie L.
Teacher & parent, Montreal