We love this sand table.  It stays in the garage, so we don't have to worry about whether the cover works or not.  Our daughter is 4 (and 47 inches) and it is very short; great for kids up to 2, maybe 3.  I wish it had extensions for the legs, but she will kneel or sit in a chair and that works okay.  It's large enough to accommodate at least 4 kids at a time.  We have about 70 lbs of sand and its pretty full.