I tried to use the coupon for the white bucket atthe store downtown, but the young teen running the place had me completely lost when he tried explaining all the combo's of better deals. He sounded like he was reading right off a script. He said only save shiny and clear ones. My youngest is 6, he was having a blast saving everything, even plain rocks, and the worker kid came over and said nope, you can't take those and dumped them out!!!! Then they have you collect all your rocks in a bag, again the worker says take only your big rocks to the "gemologist" and I'll sort through your smaller stones. Of course we get up and walk away and he dumps everything into the water! :-( Our 2 red buckets had gems in baggies but to me they look fake. My boys loved the experience with the sand but i walked out feeling less than happy, and $50 poorer!