Biology · Plant Science
Find which conditions seeds need to germinate
Germinate seeds with and without water, warmth, air and light, and find which conditions are essential.
- Beginner
- 1–2 weeks
- Under 250
606 projects · 13 streams · every class
Science Fair Projects 215
Projects with a clear question, a hypothesis you can test and results you can graph, ready for a display board and a judge's questions.
215 projects
Behavioural Economics · Nudges
Design a nudge and measure its effect
Change one small thing, such as a sign or the placement of a bin, and measure whether behaviour changes.
- Intermediate
- 2–4 weeks
- Under 250
Aerospace Engineering + Physics
Make a model wind tunnel and test shapes
Build a small wind tunnel from a fan and straws and compare the drag of different shapes.
- Intermediate
- 1–2 weeks
- 500–1,000
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
Physics · Fluid Mechanics
Build a hydraulic lift with syringes
Connect two syringes of different sizes and show how a small push lifts a large load.
- Easy
- 1 day
- Under 250
Mechanical Engineering · Fluid Systems
Design a hydraulic arm from syringes
Build a three-joint arm moved by water-filled syringes that picks up and places an object.
- Easy
- 1–2 weeks
- 250–500
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
Teaching and Learning · Teaching Aids
Build a teaching aid for a hard concept
Make a hands-on model that teaches one concept students usually get wrong, and test whether it works.
- Easy
- 1–2 weeks
- 250–500
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
Pure Mathematics + Cybersecurity
Break a secret with number theory: how RSA works
Encrypt and decrypt a message with small primes by hand, then in code, and see why large primes matter.
- Advanced
- 1–2 weeks
- Free
Biology · Microbiology
Grow bacteria from everyday surfaces
Swab phones, door handles and washed hands onto agar and compare the colonies that grow.
- Intermediate
- 2–7 days
- 250–500
Applied Mathematics + Sociology
Model the spread of a rumour
Build a logistic model of how a rumour spreads through a school and test it with a class game.
- Intermediate
- 1–2 weeks
- Free
Environmental Science · Pollution
Measure air quality with sticky cards
Hang petroleum-jelly cards at five locations and compare the particles they collect in a week.
- Easy
- 2–7 days
- Under 250
Environmental Science · Water
Build a rainwater harvesting model and size a real tank
Make a working roof-to-tank model and calculate how much rain your own roof could collect.
- Easy
- 2–7 days
- 250–500
Crops, Soil and Horticulture · Soil Studies
Test the soil of three fields or gardens
Compare soil texture, pH, organic matter and drainage at three sites and suggest suitable crops.
- Easy
- 2–7 days
- Under 250
Civil Engineering · Structural Analysis
Compare the strength of beam cross-sections
Fold the same sheet of card into flat, tube, box and I shapes and measure how much each bends.
- Intermediate
- 2–7 days
- 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
Nutrition and Food · Diet Studies
Record and analyse your diet for a week
Keep a food diary for seven days and compare your intake with a balanced plate.
- Easy
- 2–7 days
- Free
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
Physics · Modern Physics
Measure Planck's constant with LEDs
Find the turn-on voltage of LEDs of different colours and get Planck's constant from the slope.
- Advanced
- 2–7 days
- 250–500
Civil Engineering + Physics
Build and load-test a spaghetti bridge
Design a truss bridge from dry spaghetti and glue, then load it until it fails and compute its efficiency.
- Easy
- 2–7 days
- Under 250
Behavioural Economics · Experiments
Run the ultimatum game with classmates
Let proposers split ten tokens and responders accept or reject, and compare the results with theory.
- Intermediate
- 2–7 days
- Free
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