Love the umbrella!Make sure you push the water plug seal in well, or it may leak.Although directions indicated there would be pre-drilled holes for leg attachment, some were missing.   We needed a hand held drill for assembly.We have been using it with just water, and our son loves pouring the water back and forth between the two sides.  However, when we get sand it will NOT contain Crystalline Silica.  This nasty dust is a known carcinogen.  If you google safe sand for children you can find links for companies that have safe sand.