I revisited this on YouTube awhile ago and I was bathed in a pleasant nostalgia for my middle school science class days when we'd watch some of these on VHS. I hope it becomes widely available again because it's a great tool to introduce youngsters to the animal and natural world and it's mysteries. (And I didn't realize until recently that Andrew Sachs is the narrator on the UK version! Manuel himself! I guess it's good that they swap him out for Martin Sheen in the US version. Children might have a better knowledge of him than Andrew. Either version is definitely suitable for viewing though!)