I couldn't be happier with this sand water box.  My 19 month old daughter plays with it everyday for an extended length of time.  This is one of the only toys that will entertain her for more than 5 or 10 minutes at a time, and she has a LOT of different toys.  It's large enough for 2-4 kids to play at a time without getting in each others way.  It's very sturdy.  We've had a few big storms since we set it up and have not had any problems.  This is by far one of the best purchases I've made in a long time!