The kids are billed collectively as "The Holy Terrors" in the opening credits.
Filming of the British film 'Child's Play' appears to have been completed in 1952. The British Board of Film Classification has an entry for CHILD'S PLAY, distributed by Group 3 Ltd, receiving a U certificate 11/12/1952 with cuts, but it lists a 0m 0s runtime which may mean the runtime is unknown. Also, player.bfi.org.uk lists it as a 1952 film available for rental.