Moon Sand does not hold it's shape well enough to be played with. It sticks in crevices and you can't wash it up because the manufacturer warns about getting it down the drain. I live in the Midwest and will not go out in the dead of winter to wash it off from a spigot. This stuff is worse than regular sand--that at least dries out and can be brushed away. My 5 yr. old gets frustrated with the crumbling, and I am frustrated with mess.