Chemistry + Environmental Science
Make bioplastic from milk or starch
Make casein and starch plastics at home and test their strength and how they break down.
- Easy
- 1–2 weeks
- Under 250
606 projects · 13 streams · every class
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52 projects
Statistics and Probability · Probability
Test the birthday paradox
Calculate and test the chance that two people in a group share a birthday.
- Easy
- 1–3 hours
- Free
Chemistry · Electrochemistry
Build a lemon battery and compare fruits
Make cells from fruit, zinc and copper, measure their voltage and light an LED with several in series.
- Easy
- 1–3 hours
- Under 250
Chemistry · Inorganic Chemistry
Investigate what speeds up rusting
Leave iron nails in different conditions for a week and find what makes rust form fastest.
- Easy
- 2–7 days
- Under 250
Physics · Optics
Measure the speed of light with a chocolate bar
Find the wavelength of microwaves from melt spots on chocolate, then calculate the speed of light.
- Easy
- 1–3 hours
- Under 250
Psychology · Experiments
Test the Stroop effect
Time how long people take to name ink colours when the word says a different colour.
- Easy
- 2–7 days
- Free
Agri-business and Food Science + Biology
Test how storage affects fruit and vegetable shelf life
Store the same produce in five ways and record weight loss and spoilage.
- Easy
- 1–2 weeks
- Under 250
Pure Mathematics · Trigonometry
Measure heights with trigonometry
Make a clinometer and find the height of your school building, a tree and a tower.
- Easy
- 1 day
- Under 250
Electrical Engineering + Physics
Build a simple electric motor and measure its speed
Wind a coil motor with a paper-clip cradle and test how turns and magnets change its speed.
- Easy
- 1 day
- Under 250
Statistics and Probability · Probability
Estimate pi by dropping needles
Drop sticks on ruled paper, count how many cross a line and get an estimate of pi.
- Easy
- 1–3 hours
- Free
Chemistry · Physical Chemistry
Grow crystals and test what changes their size
Grow alum or sugar crystals and find how cooling speed changes crystal size.
- Easy
- 1–2 weeks
- Under 250
Biology · Botany
Compare the stomata of different leaves
Take nail-polish peels of leaves and count stomata on upper and lower surfaces.
- Easy
- 1–3 hours
- Under 250
Biology · Cell Biology
Observe osmosis in potato strips
Soak potato strips in salt solutions and find the concentration at which they neither gain nor lose mass.
- Easy
- 1 day
- Under 250
Chemistry · Physical Chemistry
Find how temperature changes reaction rate with antacid tablets
Time how long an effervescent tablet takes to dissolve at different water temperatures.
- Easy
- 1–3 hours
- Under 250
Biology + Sports and Exercise Science
Measure how exercise changes pulse rate and recovery
Record pulse before, during and after exercise for several volunteers and compare recovery times.
- Easy
- 1 day
- Free
Psychology · Cognitive Psychology
Measure the limits of short-term memory
Find how many digits people can repeat and whether grouping them helps.
- Easy
- 2–7 days
- Free
Behavioural and Cognitive Science · Attention
Test how multitasking affects performance
Compare how fast and accurately people do a simple task alone and while answering messages.
- Easy
- 2–7 days
- Free
Physics · Waves
Measure the speed of sound with two phones
Use two phones with an acoustic stopwatch app to time a clap over a known distance.
- Easy
- 1–3 hours
- Free
Physics · Current Electricity
Verify Ohm's law and find where it fails
Plot current against voltage for a resistor and a bulb and explain the difference.
- Easy
- 1–3 hours
- Under 250
Physics · Oscillations
Find g with a simple pendulum and a phone
Time pendulums of different lengths and get the acceleration due to gravity from a straight-line graph.
- Easy
- 1–3 hours
- Under 250
Sports and Exercise Science · Performance Analysis
Compare warm-up routines and sprint times
Time 50 m sprints after no warm-up, jogging and dynamic stretching.
- Easy
- 1–2 weeks
- Free
Fine Arts + Psychology
Study colour and mood with an experiment
Paint the same image in four palettes and survey what mood each conveys.
- Easy
- 2–7 days
- Under 250
Mechanical Engineering · Machines
Reduce friction in a simple machine
Measure the force to pull a load with sliding, rollers, wheels and lubricant, and compute efficiency.
- Easy
- 1 day
- Under 250
Physics + Music, Theatre and Writing
Study the physics of a musical instrument
Measure how the length of a string or the water level in a bottle changes the pitch.
- Easy
- 2–7 days
- Under 250
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