CCCWC October competition voters’ comments on Clue no. 15

A clue to YO-YO.
4 comments refer to this clue (from 4 competitors, 0 others)

Here is the text

Comments on the clue

1.	Perhaps grandchildren refers to boys, but something has gone wrong here, and not just with the enumeration
2.	Is this a ref. to oy = grandchild? Explanation needed
3.	This clue requires an explanation!
4.	Baffling. Would love an explanation.