Our switch adapted Volcano Lamp has been adapted to accept a standard switch (sold separately) or it can be used without a switch. When you press your switch, the colored 'lava' balls flow from the volcano up into the water and back down again. Nice for increasing visual attention or just as a relaxing activity. Measures approximately 8" x 3" x 3" and requires 3 AA batteries (not included). Small parts not suitable for children under age of 3. Please note this item cannot be returned once it has been filled with water unless there is a manufacturers defect.