How was it filmed?
I saw this thirty one years ago and my memory has faded a lot plus I was a child at the time (8 years old) and things look different to them. According to the description here they encounter Wholly Mammoths and Sabre Toothed tigers. CGI did not exist back then, so how the hell could such animals be made to look even remotely real? Was it claymation like King Kong or the old dinosaur movies? Did they take an elephant and use makeup to make it look like a mammoth?