'Ripple Tank collapses to a flat pack for easy transport and easy storage. Powered by either a 12V Plug Pak or a 12V.AC/DC school power supply. In one quick and simple motion - the tank assembles to be rigid and strong. The water tray is easily removed from the main frame. It has a deeper than usual recess to avoid sloshing of water when being carried. The base of the Water Tray is of hard glass to avoid scratching over time. The strong Ripple Maker ''clicks'' to the rear edge of the tank magnetically and the stroboscope is supported on a stainless steel rod from a rear corner for unobstructed access to the system. The flashing stroboscope can run at frequencies independernt of the rippler or it can be switched to synchronise for a perfectly stationary image.'