Happy Birthday -- Film Description:
"In this animated short, a perceptive young boy, at a birthday party for his uncle, notices the unfortunate result of the man's smoking habit. The film is one of a trio of animated shorts by Lynn Smith that form an anti-smoking campaign, produced by the National Film Board of Canada, with the participation of Health and Welfare Canada. Although this particular campaign was originally aimed at children, the three films have been shown on TV nationwide."
-- National Film Board of Canada

Source:
National Film Board of Canada. "NFB -- Happy Birthday" National Film Board of Canada. http://onf-nfb.gc.ca/en/our-collection/?idfilm=50827.