A postcard from 1955

Found while going through some family archives today. I sent this to my aunt and uncle when I was 8 years old. She kept it for 60+ years, and then it cycled back to me as memorabilia when her estate was settled. There are several interesting features, including the postal cancel "Fight infantile paralysis. Join March of Dimes." In 1955 I was in the recovery phase from paralytic polio, so that…