Hand-held megaphone with shoulder strap. With siren & music/speak, on/off switch and volume control. ABS housing.
Learn about hydrogen fuel cells with this incredible kit!
Build a magnetic levitating train with this science fair project kit!
Build a model car that runs on hydrogen gas using a unique reversible fuel cell!
A cool kit that helps you build your very own robotic arm!
The Star-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, writers, students, and you!
Learn all about the science of light, optics and visual perception with this wonderful kit!