Original manufacturer from the fifties. Comes in red or blue color. Bulb heats the wax inside the glass globe. Wax Globs rise and fall in continuous fascinating patterns. Everything you need to make real old fashioned root beer.
Excellent booklet describes volcanism.
A terrific science project. Invisible during the day, these stars will only glow when the lights or turned out. This is an old favorite that's been around for years but hard to find today. A strange looking bird in a top hat continually bobs up and down before a glass of water. A real curiosity.