It's more interesting than watching the grass grow I guess. Actually its getting nerve-wrackingly complex, like I feel like I started this game in the expert mode right away. If you want to make this game interesting for kids (I think you do), then I suggest putting in a beginners mode. Also I didn't like that you have to put back tools in order to grab new tools. Otherwise a nice game 3/5.
With all these moving pieces I don't know where they are going to be in the next second. I think nobody does. So without any additional control it is a game of luck.