Soft AND doughy

Looking for Christmas gifts for some wee ones last year I discovered Mary's Softdough. It's a non-crumbly modeling dough packed in a recyclable plastic tub made in the USA in rainbow hues of red, yellow, green, blue and purple. The product is made by Terrapin Toys designed and manufactured in Eugene, Oregon.
If you can't find it in stores, I have seen it on Amazon and Nico & Zoe Toys, which, by the way, has a made in USA toy section on their site. Look for a link in their sidebar.