Noun
(games) A children's game in which two people alternately clap their own and each other's hands, often to the accompaniment of the nursery rhyme "Pat-a-cake, pat-a-cake, baker's man".
(colloquial) A childish or time-wasting activity.
Source: en.wiktionary.orgHandling and manipulating different kinds of objects will help him build the manual dexterity and hand-eye coordination that make pattycake so much fun. Source: Internet
I thought the workout would be pattycake, but it was much harder than I expected. Source: Internet