Large convection currents in some laboratory liquids are made easily visible by a fine suspension of aluminum flakes. Ample contrast is available for photography. Acetone is the most practical of those liquids tested. A heat source such as a finger and a heat sink due to evaporation of the liquid are sufficient to set a small beakerful into motion at speeds around one cm/sec. A two-dimensional flow table was constructed without pumps or plumbing. Such flow is continous and long-lasting. Only a small occasional replenishment of liquid, to make up for that lost by evaporation, is necessary.