Let's take a look at the difference in compression depth between adults and children.
What is CPR American Heart Association CPR & First Aid
How CPR is performed on adults & older children
Can You Compress the Chest Too Fast During CPR?
CPR Chest Compression Depth for Adults, Infants - CPR Select
Proper Hand Placement for Effective Chest Compressions
Where do I apply CPR? I mean how do I locate the heart if it's not
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CPRFA Perform CPR And Avoid These Common Mistakes
How To Perform Cardiopulmonary Resuscitation (CPR) In Children
Physics 111: Fundamental Physics I: The Physics of Proper CPR