This is much smaller than other similar lava lamps & the water does not swirl like the picture – it's more like snow-globe type bits swirling. Way over-priced at $30. Would send back if it was worth the postage.
It is a nice lamp, does have the swirling action but the picture on the box is deceiving, when it is turned on it does not swirl like that. It has small particles that swirl around and give the illusion of a tornado-type swirl.
My son wanted a lava lamp for his 10th birthday, but I got this instead and it is (as declared by him,) much cooler. The colours change in patterns and it is great that it works with batteries (3×AA – not included,) as the outlet in his room is already used for a number of things – it can be plugged in too but the required DC 4.5mA adaptor also isn't included.
Lamp is much smaller than expected, does not swirl like a twister at all or as pictured or shown in the “sped up” YouTube video. Lamp is still cool but spins more like a soft snow globe. Would be nice if there was a setting where you could control the colour change.