this seller here
We just did the fish pouch one and ds LOVED it - he was so excited and it took us about 45 mins to an hour, with him doing most of the sewing. He was skipping around going "I've sewed! I've SEWED!"
I think we are going to try the slippers next. They say from 5 + but ds is 4 and obviously needed me to help, but had no problem doing the stitches with me pointing where each one should go.