Oh, Liz, my heart goes out to you and your son. In my life, these things are sent to teach me to be more empathetic when my kids make mistakes. You are a kind and loving mom... he will forgive you.
Perhaps you could offer to help make it up to him if the loss is permanent. If you organized the materials and provided him with some spare time, could your dh make another crane? You could show your son what you are doing: forgoing a movie date with a buddy and folding all the laundry so that his dad has time to make the crane. What if you asked dh for a train for your birthday to replace ds's, or if you used the money you usually spend on yourself (movie tickets, books)? (Forgive me if this unsolicited advice is unwelcome. For me, I try to look at ways of making things better for my kids, but you and your son may need to spend some time just understanding the loss of his treasure.)
Perhaps you could offer to help make it up to him if the loss is permanent. If you organized the materials and provided him with some spare time, could your dh make another crane? You could show your son what you are doing: forgoing a movie date with a buddy and folding all the laundry so that his dad has time to make the crane. What if you asked dh for a train for your birthday to replace ds's, or if you used the money you usually spend on yourself (movie tickets, books)? (Forgive me if this unsolicited advice is unwelcome. For me, I try to look at ways of making things better for my kids, but you and your son may need to spend some time just understanding the loss of his treasure.)