To understand the impact of this pack, you have to understand the RPG Maker art style. The default sprites are "chibi"—super-deformed, big-headed, small-bodied. Technically, they already look like children. This created a bizarre paradox where a 30-year-old war veteran and a 10-year-old villager stood at the exact same height, differing only by the presence of a beard.
With the Kid Generator Parts, developers can now easily implement: RPG Maker MV - Add-on Vol.4- Kid Generator Parts