A thin bag, made of dehydrated rawhide, meant to be traveled with on a horse's back and carry various materials. There are pasterns, painted with primary colors and black, meant to symbolize the near lands.
This is an infant's first toy and it's an amulet called a Piikstaan. An amulet like this one would often be created by Blackfoot women to give to their child. It's also known as has a nothing face.