Programming · Python
Build a number guessing game in Python
Write a game where the computer picks a number and tells the player "higher" or "lower".
- Beginner
- 1–3 hours
- Free
606 projects · 13 streams · every class
What do you want to build?
25 projects
Chemistry · Analytical Chemistry
Make a red cabbage pH indicator and test household liquids
Extract a natural indicator from red cabbage and rank household liquids from acid to base.
- Beginner
- 1–3 hours
- Under 250
Physics · Optics
Build a pinhole camera and find its magnification
Make a box camera with no lens and show that image size depends on object and screen distance.
- Beginner
- 1–3 hours
- Under 250
Chemistry · Analytical Chemistry
Separate ink colours with paper chromatography
Separate the dyes in marker pens on filter paper and calculate an Rf value for each colour.
- Beginner
- 1–3 hours
- Under 250
Pure Mathematics + Fine Arts
Explore tessellations and design your own
Find which regular polygons tile the plane and create an Escher-style tile.
- Beginner
- 1 day
- Under 250
Astronomy and Space · Planetary Science
Build a scale model of the solar system on your street
Shrink the solar system so the Sun is a football and place the planets at true scale distances.
- Beginner
- 1 day
- Under 250
Astronomy and Space · Observational Astronomy
Make a model of the solar and lunar eclipses
Use a torch and two balls to show how the Moon's shadow and the Earth's shadow cause eclipses.
- Beginner
- 1 day
- Under 250
Statistics and Probability · Probability
Design a fair spinner game and prove it
Invent a spinner or dice game, test whether it is fair and fix it if not.
- Beginner
- 1 day
- Under 250
Physics · Dynamics
Test which shapes fall slowest: a parachute study
Make parachutes of different sizes and shapes and time their fall with the same load.
- Beginner
- 1 day
- Under 250
Physics · Optics
Build a periscope and test the law of reflection
Make a periscope from card and two mirrors and show that both must sit at 45 degrees.
- Beginner
- 1–3 hours
- Under 250
Environmental Science · Water
Build a solar still to purify water
Make drinking-quality water from salty water with sunlight and measure how much you get.
- Easy
- 1 day
- Under 250
Pure Mathematics · Algebra
Make and analyse a magic square
Build 3×3 and 4×4 magic squares and prove why the centre of a 3×3 must be 5.
- Beginner
- 1–3 hours
- Free
Biology · Human Physiology
Build a model of the lungs and measure lung capacity
Make a bell-jar lung model from a bottle and balloons, then measure real lung capacity by displacing water.
- Beginner
- 1–3 hours
- Under 250
Astronomy and Space · Rocketry
Build and launch a paper rocket with a stomp launcher
Launch paper rockets with compressed air and test how fins and nose shape change the distance.
- Easy
- 1 day
- Under 250
Behavioural and Cognitive Science + Biology
Measure reaction time and what affects it
Use the ruler-drop test to compare reaction times between hands, ages and times of day.
- Beginner
- 1 day
- Free
Environmental Science · Climate
Model the melting of ice caps and sea level
Show that melting land ice raises water level but melting floating ice does not.
- Beginner
- 1–3 hours
- Under 250
Physics · Electrostatics
Build an electroscope and test charges
Make a foil-leaf electroscope in a jar and use it to compare charged objects.
- Beginner
- 1–3 hours
- Under 250
Environmental Science · Water
Build a simple water filter and test it
Layer cotton, sand and gravel in a bottle and see how clear muddy water becomes.
- Beginner
- 1 day
- Under 250
Physics · Current Electricity
Build a simple circuit board game
Make a quiz board where a bulb lights when a question is matched to the right answer.
- Beginner
- 1 day
- Under 250
Earth Science · Physical Geography
Model a river and study erosion
Run water down a sand tray and see how slope, flow and plant cover change erosion.
- Easy
- 1 day
- Under 250
Chemistry + Environmental Science
Test how well different materials filter dirty water
Build layered filters from sand, gravel and charcoal and compare how clear the water comes out.
- Easy
- 1 day
- Under 250
Earth Science + Crops, Soil and Horticulture
Test soil types for water holding and drainage
Pour water through sand, clay and loam and measure how much each holds and how fast it drains.
- Easy
- 1 day
- Under 250
Physics · Kinematics
Show that falling time does not depend on mass
Film objects of different mass falling together and compare their fall times frame by frame.
- Beginner
- Under 1 hour
- Free
Programming · Scratch
Make an interactive story game in Scratch
Create a choose-your-own-adventure story with characters, scenes and choices.
- Beginner
- 1 day
- Free
0 to compare
Compare