10 Easy Science Experiments for Class 3 & 4 at Home
No lab needed — just everyday things from the kitchen. Plant growth, water cycle, sink vs float, magnets, shadows, and more. Each experiment takes under 15 minutes.
TL;DR: No lab needed — just everyday things from the kitchen. Plant growth, water cycle, sink vs float, magnets, shadows, and more. Each experiment takes und…
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Why Do Hands-On Science Experiments?
Experiments are how real science works. Your child reads "water boils at 100°C" in a textbook, but when they actually heat water in a glass and see steam rise, it clicks. Textbook learning goes into short-term memory. Hands-on learning goes into long-term memory and becomes part of how the child thinks about the world.
Experiment 1: Seed Sprouting (Plant Growth)
What you need: Bean seeds, wet cotton, clear glass jar, water\n\nSteps: Place wet cotton at the bottom of a clear jar. Place bean seeds on the cotton. Keep cotton moist. Observe daily.\n\nWhat happens: Within 3-5 days, roots appear going downward, and shoots appear going upward. Explain gravity: roots always go down (towards water), shoots go up (towards sunlight).\n\nLearning: Plant growth, gravity, roots absorb water, photosynthesis
Experiment 2: Water Cycle in a Bag
What you need: Ziplock plastic bag, water, permanent marker, sunny window\n\nSteps: Draw rain, clouds, sun on the bag with marker. Fill with water. Seal completely. Stick on a sunny window with tape.\n\nWhat happens: Water evaporates (turns to invisible steam), condenses (becomes droplets on the bag), and falls as rain inside the bag. The cycle repeats.\n\nLearning: Evaporation, condensation, water cycle
Experiment 3: Sink or Float
What you need: Large bowl of water, various household items (pencil, orange, stone, paper, apple, toy)\n\nSteps: Predict: will this float or sink? Then test each object.\n\nWhat happens: Light objects float. Heavy or dense objects sink. You can cut an apple in half and test both — both sink because apples are dense.\n\nChallenge: Try placing a stone on a tin foil boat. The foil floats but stone sinks. Explain: shape and air pockets matter.\n\nLearning: Density, buoyancy, mass vs volume
Experiment 4: Magnet Strength Through Different Materials
What you need: Magnet, iron filings or small paper clips, plastic sheet, cloth, aluminium foil, paper\n\nSteps: Place magnet under plastic. Sprinkle iron filings on plastic. Observe the pattern. Repeat with cloth, foil, paper.\n\nWhat happens: The magnet\'s force passes through some materials (paper, plastic, cloth) but not others (metal foils).\n\nLearning: Magnetism, magnetic fields, materials that block magnetism
Experiment 5: Shadow Length Changes (Angle of Sun)
What you need: Stick, paper, pencil, sunny outdoor space, measuring tape\n\nSteps: Stick a pencil straight up in paper. Measure its shadow length at 8 AM, 10 AM, 12 PM, 2 PM.\n\nWhat happens: Shadow length changes. At noon, shadow is shortest. Shadow also rotates as the sun moves.\n\nLearning: Sun\'s position changes throughout the day, shadows depend on light angle
Experiment 6: Colour Mixing (Pigments and Light)
What you need: Water, food colouring (red, blue, yellow), clear cups\n\nSteps: Mix red + blue → purple. Mix red + yellow → orange. Mix blue + yellow → green. Try all combinations.\n\nWhat happens: Primary colours mix to make secondary colours.\n\nChallenge: Add more red to purple → magenta. Explain concentration and shades.\n\nLearning: Colour theory, primary colours, mixing ratios
Safety Rules for Home Experiments
All experiments here are safe for Class 3-4 kids but follow these rules:\n\n- Adult supervision always\n- Never taste or drink any liquids used in experiments\n- Wash hands after finishing\n- Clean up immediately\n- If something breaks, ask an adult\n- Hot water experiments (like Experiment 2 if in sun too long): let it cool before touching
Frequently Asked Questions
What if an experiment doesn't work perfectly?
Perfect! That's real science. Talk about why: maybe not enough time, temperature was wrong, or we did something differently. Use it to understand variables.
How do I record the experiment?
Draw pictures or write: What did we predict? What happened? Was it surprising? Take before/after photos. Write a few sentences explaining what you learned.
Can I do these at school?
Yes. These are safe for classroom use too. Teachers often use hands-on experiments to match NCERT Science curriculum.
How long does each experiment take?
Setup: 2-5 minutes. Observation: 10-30 minutes. Some (like seed sprouting) need observations over several days.