9 Best Stem Fair Project Ideas for High School 

1. Solar-Powered Water Purification: Clean water solution using solar energy.

[{"selector":"#anim-72e0214e-87ef-4472-8b81-77f3399ab0c9","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-01e54362-9a4c-45ef-be40-71e2f2199ab1","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

2. Renewable Energy Mapping: Analyzing potential for renewable energy sources.

[{"selector":"#anim-aedac67c-eb1d-41ac-bb4c-8b399830d62e","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-b3d5fbc9-57fd-4c7b-9a8e-fd983f399f9b","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

3. Biodegradable Plastic Alternatives: Eco-friendly alternatives to plastic.

[{"selector":"#anim-69e87e12-dd5f-4e01-9604-dbe016596e96","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-aff35803-0c0c-4e7f-83b2-ade01a442c98","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

4. Urban Air Quality Monitoring: Sensors to monitor air quality in cities.

[{"selector":"#anim-7585a851-ed59-4682-90f0-bf68002f6bed","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-bfc92d28-2142-455a-8223-19cc2e8a465c","keyframes":{"transform":["translate3d(-116.61342%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

5. Hydroponic Farming Systems: Soilless farming for urban agriculture.

[{"selector":"#anim-83cc41a7-e190-4784-b064-78c9f8a5d1b0","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8765663b-a581-4c83-980f-a2d72c1f7565","keyframes":{"transform":["translate3d(-116.29393%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

6. Automated Waste Sorting: AI-powered waste sorting system.

[{"selector":"#anim-5312c748-caf6-4109-bcdb-66b399d138a1","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3b0bd40b-2893-4bf3-b5cf-49ebed0a2211","keyframes":{"transform":["translate3d(-115.65495%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

7. Interactive Virtual Reality Learning: VR for immersive education experiences.

[{"selector":"#anim-72fd0f1b-9575-4486-8dec-4ddd57ac1874","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6cd84174-380b-4a62-a5b1-0b23b5cda313","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

8. Smart Home Energy Management: Energy-efficient systems for homes.

[{"selector":"#anim-9ef0e3c3-fdf9-4680-8026-eaee67fca030","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-10f89bea-4dd0-4680-bcbe-51a6f7f14fcc","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

9. DIY Wind Turbine Construction: Build your own wind turbine project.

[{"selector":"#anim-bd5ff57e-6b00-4b78-90f7-5a887c783d95","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-886b778d-c05b-44f0-a19d-a210a28e3fed","keyframes":{"transform":["translate3d(-115.33547%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]