Well, Spin Master listened to their reviews and changed their dough recipe! Then they offered us (once again via Team Mom) a go at the new Moon Dough!
I don’t know what they changed, but it is MUCH better! It still molds beautifully, and it’s still soft, but no more crumbs! My cousin and his wife and three (soon to be four!) kids came to stay with us over Labor Day. All six kids (aged six and under, what a party!) were so enthralled with this stuff that they were carrying it all over the house. No crumbs!
The new moon dough I would definitely give as a gift for a 3-6-year-old. It’s hypoallergenic, never dries out, and – now that it is less crumbly – it can be shaped by little hands as well as with the included (very fun and easy to use) molds!