On Sat, 07 May 2011 17:53:40 +0100, John Rumm
wrote:

It has its DIY uses, but is not very satisfying for kids - it so fine it
has little body and even when wet is not easy to make free standing
"things" out of. IME play sand works better with a bit more variation in
grit size so that it locks together better.

Now I'm not sure what to buy, the other replies seemed to recommend
it!