This is an example of what small children would wear in the decade. It is a lot diverse, that what we see today, but it for sure made a statement. Kids wore this attire in movies and tv shows, like the brady bunch
Leif Garret - The Leisure Suit was an often guady fashion ensemble worn by men in the The leisure suit consisted of a shirt like suit coat with matching pants. It was usually paired with a mostly unbuttoned shirt with a huge collar.