The Disappearing Light: A Winter Torch Experiment for Curious Kids

The Green Elephant
Jun 12
4 min read

👶 3–5 years • ⏱️ 15–20 mins • 🎨 Mess: 1/5 • 📍 Any room you can darken • 🧠 Cause and effect

What You'll Need

✔️ Torch (a small handheld torch or phone torch)

✔️ Tissue paper (one or two sheets)

✔️ Regular paper (a sheet of printer paper or notebook paper)

✔️ Cardboard (a cereal box panel or piece of cardboard packaging)

✔️ Face washer or thin cloth

✔️ Tea towel

✔️ Colander or slotted spoon (for bonus light-pattern play)

✔️ Blanket or towel (to block window light if needed)

Let's Do It

Choose a room you can darken well. Block any window light with a blanket or towel, clear the floor of tripping hazards, and lay out your torch and covering materials within easy reach.

Sit together on the floor, turn off the lights, and switch on the torch. Let your child hold it and sweep the beam around the room, noticing how the light lands on walls, ceiling, and objects. 'Look at that bright circle on the wall. What happens when you move the torch closer? Further away?'

Hand your child the tissue paper and ask them to hold it over the torch. Then try the regular paper, the face washer, and finally the cardboard. After each one, pause and let them describe what they notice about the light. 'Can you still see the light through this one? Is it bright or dim? What about this thicker piece, what do you think will happen before we try it?'

Introduce the seasons connection. Explain that in winter, thick clouds cover the sun the way the cardboard covered the torch, and the sun goes away earlier in the afternoon. In summer, the sun stays out much longer, like when the torch has nothing covering it at all. 'Remember how the cardboard blocked almost all the light? In winter, the sun hides behind the earth earlier, so it gets dark while we're still eating dinner. In summer, the sun stays up so late you might still see daylight at bedtime.'

For a bonus round, hold the colander or slotted spoon in front of the torch and let your child watch the pattern of light dots scatter across the wall. Invite them to move the colander closer and further from the torch to see how the pattern changes. 'Whoa, look at all those little lights. Do they remind you of anything? What happens if we wiggle it?'

Turn the room lights back on gently. Sit together and chat about what they discovered. Connect it to their own bedtime: in winter it might be dark outside when they go to bed, and in summer it might still be light. Both are normal, both are how the seasons work. 'You figured out that thicker things block more light. That's exactly what a scientist does: tests things and watches what happens. Tonight when it's dark outside at bedtime, you'll know why. The earth is just tilting away from the sun for a little while.'

Preschooler holding tissue paper over a torch beam, watching the light change through the material.

Why We Love This at The Green Elephant

There's something powerful about handing a child a torch and a question. When your preschooler holds tissue paper over that beam and watches the light shift, they're doing exactly what scientists do: predicting, testing, and revising what they thought they knew. This kind of cause-and-effect thinking builds the dispositions that carry children through every learning challenge ahead, from curiosity and persistence to the confidence to say 'I think this will happen' and then check. And here's the quiet magic of this one. By the time you turn the lights back on, your child has a real answer for why winter evenings get dark so early. That understanding can shift bedtime from something confusing into something that simply makes sense, because they figured it out themselves.

Safety First

Keep the torch beam away from eyes, yours and your child's. A quick flash of bright light can be uncomfortable, especially in a fully darkened room. Before you switch off the lights, do a quick scan of the floor for anything that could be a tripping hazard.

Quick Tips

Success: Let your child predict what will happen before each covering goes on. The anticipation and then checking their guess is where the real learning lives.

Avoid: Jumping ahead to tell them what will happen. The magic is in their guess, not your answer.

Cleanup: Everything goes back in the drawer. This is genuinely a zero-mess activity, so enjoy that rare win.

Make It Work for Your Child

Younger (2–3 years): Skip the seasons explanation and focus purely on the sensory magic of light and dark. Let them hold the torch, cover it with a cloth, and uncover it. The peek-a-boo element of light appearing and disappearing is captivating at this age. Use only two or three covering materials to keep it simple.

Older (4–5 years): Invite them to sort the materials from thinnest to thickest before testing, then predict the order from most light to least light. After the experiment, they can draw or dictate a simple 'science report' of what they found. You can also introduce the idea that the earth tilts on its axis, using an orange and the torch to demonstrate.