Mexican ? figures

My grandparent traveled extensively and I have inherited these items. They, from what I have researched online, appear to be from the Mexico region. I am not sure. There are acually 4 items as seen in  the attached photos. The tallest item in approx 6 inches in height. The second about 4 inches and the third is also about 4 inches. All are solid in nature and appear to be made of some form of pottery material, or posibly even stone material. I have remembered seeing these items since I was about 6 or so years old, so that would make them at least 50 years from that time.  There are no markings of any sort on any of the figures.