Drinking birds, also known as insatiable birdies, dunking birds, drinky birds, water birds, dipping birds, (cover page URL) and “Sippy Chickens” are toy heat engines that mimic the motions of a bird drinking from a water source. They are sometimes incorrectly considered examples of a perpetual motion device.
Acid techno, sometimes known generally as "acid", is a genre of techno that was derived from acid house and developed in Europe in the late 1980s to early 1990s. It saw younger artists apply the "squelching" synthesizer sound of Chicago acid house to harder-edged techno material.