We put it in a tote inside at the science fair. Not sure how long it would hold up outside.

How long does it take to build?

Thank you for your question. It depends on the model and the building speed of the user. There are 6 different models that you can build with varying levels of difficulty. You can learn more here: http://www.thamesandkosmos.com/products/manuals/624811_hydropower_manual.pdf

Will a 6 yr old be able to use this?

With some oversight, yes. It is an assembly where there are instructions that need to be followed, with some explanations and other tips in written form, so it is helpful if the assembler can read, understand, and fully comprehend. Once assembled, there are gearing changes and other adaptations that can be done by a 6-year old after he/she has a basic understanding of the actual workings of the generator assembly. We used this set for a 7th grade science fair experiment, so the assembly was 100% done by my then 13-year old son. But I followed along out of curiosity and I think it could be assembled by a younger set of hands with adult supervision.

The led broke on this contraption, and attaching a new led doesn't seem to work. i tried a 3ohm bulb with no success. suggestions?

When mine broke, I thought it was the LED bulb, but it was actually the motor. It is possible that is what is wrong with yours.

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💡 Dive into the future of energy with hands-on hydropower innovation!

STEM LEARNING MEETS FUN - Engage with 12 interactive experiments exploring water’s energy, pressure, and properties.
MODULAR INTUITIVE DESIGN - 105 durable, easy-to-assemble acrylic pieces with a full-color 32-page manual for seamless building.
HANDS ON HYDROPOWER MASTERY - Build 10 dynamic water-powered models that bring mechanical physics to life.
PERFECT FOR FUTURE INNOVATORS - Designed for kids 8+, this kit sparks curiosity and family bonding through science.
ECO FRIENDLY ENERGY EXPLORATION - Create a working hydroelectric power station that lights an LED—no batteries needed.

The Thames & Kosmos Hydropower Kids Science Kit offers 105 modular pieces to build 10 models and conduct 12 experiments that teach children aged 8+ about hydropower, water properties, and renewable energy. Featuring a detailed 32-page manual, this STEM kit enables kids to construct a hydroelectric power station that lights an LED without batteries, fostering practical understanding of mechanical physics and sustainable energy.

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Product Dimensions	37.08 x 5.84 x 29.21 cm; 0.28 g
Manufacturer recommended age	8 - 8 years
Item model number	624811
Educational Objective(s)	Scientific Concept Development Skills
Language:	English
Number of Puzzle Pieces	105
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
tech_spec_battery_description_toys	No battery required
Material Type(s)	Acrylic
Remote Control Included?	No
Color	Multi-colored
ASIN	B001TGAYU0

Thames & KosmosHydropower, Kids Science Kit, Learning Resources for Mechanical Physics, STEM Toys for Science Experiments, Age 8+

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