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.
A massive mounted set of 100 rocks and minerals found in the US,
This black scorpion specimen is great for the classroom setting!
Check out this high-quality gyroscope!
Learn how solar cells transform light into electrical energy with this great kit!
This adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!
This SUPER Erector Construction set is one of the best you'll find anywhere!
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