reference of an -ing sentence
Does "delighting in the big and small" in the last line of the following context refer to "they" or "child’s play"?
Context:
The Art Guys use the everyday common materials, including food, to create carrot wheels, drawings made from pencil shavings and glued cigarettes to paper. They seem to work by their inspiration in a serendipitous way that recalls child’s play, delighting in the big and small.