Make your voice sound like a robot with this cool voice changer solder kit. Add vibrato effect, or use the pitch buttons to make your voice sound lower or higher. It also comes with a built-in power amplifier and microphone--simply add a speaker to the unit. Great for pranks, as a novelty toy, or as a stocking stuffer.
Build a model car that runs on hydrogen gas using a unique reversible fuel cell!
Make the coolest 3D pin art on your desk with this amazing desk toy.
This adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!
Check out this amazing renewable energy science kit featuring the wonders of hydroelectric power!
Build a magnetic levitating train with this science fair project kit!
This classic device is used to demonstrate the conservation of mechanical energy.