Science Experiments With No Materials: 10 Investigations Using Only Paper and the Room

Sometimes there is no kit, no shopping trip and no time to prepare. You still have paper, a pencil and the room around you. That is enough for real science: a question, a fair test, careful measuring and an explanation.

Each investigation below uses only scrap paper, pencils or erasers, a few books, a desk, the floor, a window and a clock with a second hand (or a phone timer). Each is best run as a fair test: change one thing, measure one thing, keep everything else the same. To teach that idea first, try the lesson What is a fair test?, which also needs no materials.

Run every test two or three times and compare, because a single try can be a fluke.

1. Does a crumpled sheet fall faster than a flat one?

Method: Take two identical sheets of paper. Leave one flat and crumple the other into a tight ball. Hold both at the same height and let go at the same moment.

What to look for: The ball lands first. Both have the same weight, but the flat sheet catches more air as it falls, and air pushes back up on it. That push is called air resistance. Try a loosely crumpled ball next and see where it lands.

2. Do longer wings slow a paper spinner?

Method: Cut a strip of paper about 3 inches wide and 8 inches long. Cut a slit down the middle of the top half, then fold one side left and one side right to make two wings. Fold the bottom up a little. Drop it from head height and time the fall by counting. Make a second spinner with shorter wings and compare.

What to look for: Longer wings usually spin more slowly and fall more slowly, because they catch more air. Drop from the same height every time.

3. Which paper bridge holds the most?

Method: Set two books about 6 inches apart. Lay a flat sheet across the gap and see how many erasers or pencils it holds before it sags. Fold a second sheet of the same size into an accordion with pleats about half an inch wide, and test it the same way.

What to look for: The folded sheet holds much more. Folds make paper stiff because the bends resist sagging, which is why many real roofs and bridges use folded shapes.

4. What makes a paper airplane fly farthest?

Method: Choose one thing to change, such as wing width or the angle of the wings. Make two planes that differ in only that. Launch each three times from the same line with the same effort, and measure in floor tiles or shoe lengths.

What to look for: Which design wins, and how steady each one is. If you change two things at once, you cannot tell which one mattered, which is a good way to see why a fair test changes only one.

5. How does a shadow change as the object moves?

Method: Stand a pencil upright in a crumpled ball of paper on a desk, in front of a window or lamp. Slide it closer to the light, then farther away. Mark the shadow’s tip on a sheet of paper each time and measure the length.

What to look for: Closer to a nearby lamp usually makes a bigger, fuzzier shadow. Farther away makes it smaller and sharper. Shadows show that light travels in straight lines and is blocked by objects.

6. How strong is a paper column?

Method: Roll a sheet of paper into a tube and tuck the edge in so it holds. Stand it on end and rest a light book on top. Add books one at a time. Make another column from a folded triangle shape and a third from a square shape, and compare.

What to look for: A rolled tube can hold a surprising amount of weight, while the same flat sheet holds none. Shape is what makes the paper strong.

7. How fast is your reaction time?

Method: Fold a strip of paper in half again and again to make equal sections, and mark each fold with a pencil. One person holds the strip at the top while a partner holds a finger and thumb open at the bottom. Let go without warning, and the partner catches. Note the mark where it was caught. Do five tries each.

What to look for: A lower catch means a slower reaction. Does it change when the catcher is distracted or has practiced? Show the results on a simple bar graph.

8. Does sound travel better through air or a desk?

Method: One person taps a pencil gently on one end of a desk. A partner listens at the far end, first with an ear in the air near the desk, then with an ear pressed to the desk and eyes closed. They rate the loudness from 1 to 5. Keep each tap the same strength.

What to look for: Sound usually seems louder through the solid desk, because vibrations pass easily through packed particles. Try a different desk or the floor and compare.

9. What happens to your pulse when you exercise?

Method: Sit quietly for a minute. Find your pulse on your wrist or neck and count the beats for 15 seconds, then multiply by 4. Do 30 seconds of marching in place and count again straight away. Count a third time after a minute of rest.

What to look for: The pulse rises with exercise and falls back with rest, because working muscles need more oxygen and the heart pumps faster to deliver it. Bodies differ, so compare each person with their own earlier numbers, not with each other.

10. Which surface is the slipperiest?

Method: Lean a large book against a stack of books to make a ramp. Slide an eraser down it onto different surfaces at the bottom: a sheet of paper, the desk top and the floor. Measure how far it slides past the ramp, three times for each surface.

What to look for: Smooth surfaces let it slide farther and rough ones stop it sooner. The rubbing force between surfaces is friction. Keep the ramp and the eraser the same every time.

Turn any of these into a real investigation

1. Ask a testable question. “Which paper bridge holds the most?” can be tested. “Which bridge is nicest?” cannot. The lesson What makes a good science question? gives older children practice.
2. Predict first. Write one sentence about what you expect and why.
3. Change one thing. Keep everything else the same.
4. Record as you go. Write each result on paper, not afterwards from memory.
5. Explain. Use your results as evidence. The lesson How do scientists turn results into answers? is a good follow-up.

For more of the same, read science lessons that need no materials, which covers evidence cards and role-play. If you are covering a class at short notice, the no-prep sub plans page is built for it.

Frequently asked questions

Do these really need nothing else?

Only scrap paper, pencils, erasers, a few books, a clock and the room. Without a clock, count “one-one thousand, two-one thousand” for rough timing.

What ages are these for?

Most work from about Grade 1 to Grade 8, with changes in depth. Younger children can watch, compare and say what happened. Older children can measure carefully, repeat trials, find averages and draw graphs.

What if the results are messy or surprising?

That is real science. Check whether anything besides your chosen variable changed, repeat the test and compare. A surprise is the start of a better question, and a clear record of what you did matters more than getting the expected answer.