When you place your hand around the large glass bulb on the bottom of the Hand Boiler, you'll see the colourful liquid shoot up the twisting, turning tube. Once at the top, the coloured liquid will begin to bubble rapidly‚ just as if it were boiling!
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This is a classic science toy that was once referred to as a "love meter" to determine if someone was hot or not. Today, it's a beautiful piece of scientific apparatus that is sure to be a favourite on your desk or shelf. Caution: Made of glass. Recommended for ages 8 & up (with adult supervision) Assorted colours.