This Hand Bubbler Pen from Toysmith magically demonstrates energy transfer in a cool, fun way! Hold the bottom chamber between your fingers and watch as your body heat warms the liquid. As it starts to vaporize, it expands moving it's way through the tubes to the upper chamber. When all the liquid has reached the top, a bubbling effect is created! Let go and the liquids cool, and move back down to the lower chamber. Great for science class! Includes matching stand. Each sold separately. Product is made of glass and is not intended for use by children. Available in four colors red, blue, green and black. Yours will be chosen at randomly from stock.

WARNING:Not intended as a toy for children. Contains Ethyl Alcohol. Avoid contact with eyes. In case of eye contact, flush thoroughly wiht water. If irrigation persists, get medical attention. Do not use near heat or flames. Only warn using your hand. Liquid will stain if glass is broken. Keep out of reach of children.

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Refurbishment Supplies for Popular STC and FOSS Science Curriculum Kits

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