[alpacassei]

Originally Posted by Bright_moon

It sounds like the US version might be different then. Yes the one I've got is coarse and grey, so presumably they have added clay to it for extra absorption? My girls seem to like it and I don't think they try to eat it but I might get that play sand anyway just to eliminate a possible risk. Although, wouldn't sand be just as risky if ingested, wouldn't that clump too? Or is it different to clay when wet?

When clay clumps, it forms a hard solid lump (think like cat litter). Sand clumps are just held together by moisture and will come apart under pressure or when dried (kinda like when grains of rice stick together).