On the pictures you do see the dressed up boys. In the middle bowls with different food, they choose different colours so it forms a kind of windrose. And a women in one breastfeeding, in the other not.
Do you spot the differences?
From Guide to Java, an old secondhand version from the seventies
including pictures of the youth with flared jeans
From Bloemen van het heelal by Alit Veldhuisen-Djajasoebrata,
A book about the ritual and spiritual meaning of Batik