Children making fool change side (7)

I believe the answer is:

kiddies

'children' is the definition.
(I know this)

'fool change side' is the wordplay.
'fool' becomes 'kid' (kidding is a kind of fooling).
'change' indicates an anagram.
'side' anagrammed gives 'dies'.
'kid'+'dies'='KIDDIES'

'making' acts as a link.

(Another definition for kiddies that I've seen is " Children".)

I've seen this clue in The Daily Express.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.