I just bought the sand picture in blue for a (what I thought) was going to be an original Christmas present for one of my sons who loves unsual gadgetry like this. Sorely disappointed. The picture looks like it is bright and interesting to view. In reality it was very dull and just looked like dirty sand mixed with blue water. To get any sort of effect one had to hold it up towards a light which is not that easy to do when you plan to put it on a shelf or something. Really awful product sorry.