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🔬 STEM Activities at Home

5 Fun, Low-Prep Activities for Ages 8–10

1. 🌋 Baking Soda Volcano

Time: 20 minutes

Materials:

Baking soda

White vinegar

Washing-up liquid

Food colouring

A cup or small bowl

A tray (to catch the mess!)

What to Do:

Place the cup on the tray.

Add 3 tablespoons of baking soda to the cup.

Add a squirt of washing-up liquid and a few drops of food colouring.

Pour in a splash of vinegar and watch the eruption!

Experiment with more or less vinegar to change the reaction.

💡 Quick Tip: Ask your child to predict what will happen before each pour — this builds scientific thinking skills.

2. 🌉 Spaghetti and Marshmallow Tower

Time: 25 minutes

Materials:

20 sticks of dried spaghetti

20 mini marshmallows

A small weight (a coin or eraser)

A ruler

What to Do:

Challenge your child to build the tallest freestanding tower using only spaghetti and marshmallows.

The tower must hold a small weight on top for 10 seconds.

Give them 20 minutes to design and build.

Measure the final height and celebrate their effort!

💡 Quick Tip: Encourage redesigning if it falls — explain that engineers always test, fail, and improve.

3. 💧 Sink or Float Experiment

Time: 15 minutes

Materials:

A large bowl or basin of water

10 household objects (spoon, coin, sponge, pen lid, grape, etc.)

A notebook and pencil

What to Do:

Lay out all the objects next to the bowl.

Ask your child to predict whether each one will sink or float, writing it down.

Test each object one at a time.

Record the actual results and compare them to the predictions.

Discuss why some results were surprising.

💡 Quick Tip: Introduce the word density simply: "Heavier stuff packed into a small space tends to sink."

4. 📐 Paper Bridge Challenge

Time: 30 minutes

Materials:

3 sheets of A4 paper

Tape

Two stacks of books (equal height)

Coins or small weights

What to Do:

Place the two book stacks about 20 cm apart.

Challenge your child to build a bridge using only the paper and tape that spans the gap.

Once built, start adding coins one at a time to the bridge.

Count how many coins it holds before collapsing.

Try folding the paper in different ways (accordion folds work brilliantly!) and retest.

💡 Quick Tip: Ask: "How could you make it stronger?" Folding, rolling, and layering all change the structure.

5. 🌱 DIY Seed Germination Lab

Time: 10 minutes to set up · Observe over 5–7 days

Materials:

2–3 zip-lock bags

Cotton wool or paper towels

Fast-growing seeds (cress, bean, or sunflower)

Water

A sunny windowsill

What to Do:

Dampen the cotton wool and place it inside each bag.

Tuck 2–3 seeds between the cotton wool and the clear side of the bag.

Seal the bags and stick them to a sunny window.

Check daily — your child draws or notes any changes in a simple journal.

Try one bag in a dark cupboard to compare growth!

💡 Quick Tip: The dark vs. light comparison introduces a real science concept — variables — in a simple, visible way.

All activities use everyday household items and need no specialist knowledge to supervise. Happy experimenting! 🚀

After-school STEM activities at home (ages 8–10)

🔬 STEM Activities at Home

5 Fun, Low-Prep Activities for Ages 8–10

1. 🌋 Baking Soda Volcano

2. 🌉 Spaghetti and Marshmallow Tower

3. 💧 Sink or Float Experiment

4. 📐 Paper Bridge Challenge

5. 🌱 DIY Seed Germination Lab