Safety Shake Light
Did you know you can create a light without batteries or power? A shake light relies on mechanical power to turn on the light bulb. Use your muscles to make …
Did you know you can create a light without batteries or power? A shake light relies on mechanical power to turn on the light bulb. Use your muscles to make …
Use a straw, scissors, and paper to engineer a small poinsettia-shaped propeller. Then, design a device that will allow you to power your poinsettia spinner using only air from your …