I just dump a bag or two in the corners under the trees in my yard - the corners stay coolest when the weather is hot -so they tend to congregate there... i found some at TSC on clearance for 99 cents a bag - almost had to have a cigarette- my van did not like hauling that sand home - especially since i had 2 -50 pound bags of feed too.... but i couldnt resist that price - they love it - plus i sprinkle a little water on it in the morning - to give them a little more cool during the day