Set of 2 Native Sand Paintings (Sand Art)

Vintage set of 2 native sand paintings made by Rainbow Way Ltd in Albuquerque New Mexico during 1978. One features The Great God Spirit and the other is a Sioux Indian Battle Design. Both have a 6.5" by 5.5" wooden base while the paintings are about 4.25" by 5.25". Both have a bit of staining, water splatter?, but the designs are well intact given their age.