Lava lamps have been a popular decorative item since they were first introduced in the 1960s. The original lava lamp was designed by British inventor Edward Craven Walker, and it is still produced today by the Mathmos company. Lava lamps are simple devices that create a calming, relaxing effect. They consist of a glass globe filled with colored wax and clear liquid. When the lamp is turned on, the heat from the lightbulb melts the wax, causing it to rise and fall in a slow, mesmerizing motion. Walker originally created the lava lamp as a scientific experiment, but it soon became a popular decoration for homes and offices. Today, lava lamps are still cherished for their retro style and calming effect. Go to full description...