Yep! When I did sand trays in her office, she'd take pictures after I left before taking them apart, so we could talk about them later and she could compare them to each other. So I still take pictures of mine now, so I can work with them later. Interesting note I mentioned one time after I made my own at home that it felt weird taking it apart after the fact, and she said no, don't do that yourself, you need to have someone else take them apart. And don't watch them do it. There's a reason why I'd leave them be until after you left. So now I have hubby or son do it for me. I hadn't even thought of that, it's so fascinating to me I wanted to research why it works but figured that might take the magic out of it so I hadn't realized.