The poem fits in with the theme of innocence, as it makes no mention of the negative aspects of playing outside; the children are oblivious of the dangers of playing outside late at night that would be considered in a modern society.
The poem is consistent with the theme of childhood, as it disregards any references to the unfavorable aspects of playing outside; the children are oblivious to the hazards associated with playing outside late at night that would be taken into account in today's society.