Learning Activities for 9-Year-Olds

Build a working pinwheel windmill and test how wind speed and blade angle affect rotation. Engineering meets environmental science in this hands-on STEM project.

Flip a coin 100 times and record heads vs. tails. Discover that probability predictions get more accurate with more data — a core concept in math and science.

Make a pH indicator from red cabbage juice and test household liquids to discover which are acids and which are bases. Rainbow chemistry from your kitchen.

Build a pendulum and test what affects its swing speed — string length, weight, or release angle. Real physics with a real answer that surprises most people.

Scrape Oreo cream into moon phase shapes to model the lunar cycle. A delicious astronomy lesson where every phase is edible.

Solve a grid-based logic puzzle by eliminating possibilities with clues. A pure reasoning exercise that builds deductive thinking and organized problem-solving.

Test what happens when you mix common kitchen ingredients — baking soda + vinegar, milk + food coloring + soap. Set up a proper lab with safety gear and data recording.

Write secret messages with lemon juice and reveal them with heat. A chemistry experiment disguised as a spy game that teaches chemical reactions and pH.

Grow crystals from a saturated sugar or salt solution over several days. Watch as invisible molecules organize themselves into glittering geometric structures.

Hunt for geometric shapes and angles in the real world and photograph them — parallel lines in a fence, right angles in a window frame, spheres on a playground.

Research animals in an ecosystem and draw a food web showing who eats whom. A visual way to understand energy flow, predators, and ecological balance.

Create a series of connected puzzles that must be solved in order to unlock a final prize. Problem-solving, logic, and teamwork in your living room.

Build a simple circuit and test which materials conduct electricity. Metals, water, graphite — discover what lets electricity flow and what stops it cold.

Design a container to protect a raw egg from a high drop. Engineer, build, test, and redesign — the ultimate STEM challenge that ends with a dramatic splat or save.

Build a sealed terrarium ecosystem with soil, plants, and moisture. Watch the water cycle, photosynthesis, and decomposition happen in a closed system for weeks.

Extract real DNA from a strawberry using dish soap, salt, and rubbing alcohol. Pull out gooey white strands and hold the blueprint of life in your hands.

Pick a kid-friendly debate topic, build arguments for and against, and hold a structured family debate. Critical thinking and persuasive speaking in a fun format.

Build a rotating cipher wheel and use it to encode and decode secret messages. Learn the same encryption principle that Julius Caesar used to protect military secrets.

Give your child a pretend budget and a list of items with prices. They must plan spending, make trade-offs, and calculate change — real financial literacy in action.

Design and build a bridge from craft sticks and glue that can hold weight. A genuine engineering challenge that teaches structural design through trial and error.

Translate your name into binary code and make a bracelet with beads — one color for 0, another for 1. Wearable computer science that looks cool too.

Measure rooms in your house to calculate area and perimeter. Real-world math that answers the question 'how much carpet would we need for this room?'

Pick an ancient civilization, research 5 key facts, and create a mini poster. Build research skills, note-taking, and presentation confidence in one project.

Learn to create and crack secret codes using real cipher techniques — a brain-building puzzle activity that combines math, logic, and language.

Stack colorful liquids in a glass to build a density tower — a striking visual science experiment that teaches molecular density and the scientific method.