Dated children's language for hair. Modern children more often use 髪の毛 or ヘア.
See also: 髪
In old picture books, you sometimes see expressions like 'I'll tie up your hair' using かんかん.
ornamental hairpin (child's word)
Dated children's language for an ornamental hairpin, related to かんざし. Rarely used today.
See also: かんざし
I remember my grandmother saying, 'What a pretty hairpin!' using かんかん.
A reduplicated child's word, likely derived from the first syllable of かみ (hair) or かんざし (hairpin). The exact origin is uncertain.