If you aren't ready to buy this pack, the RPG Maker Web Forums host numerous for free, though they may require more manual effort to install than the official DLC. Add-on Vol.4: Kid Generator Parts - RPG Maker MV - Steam
Allows for "flashback" sequences where adult protagonists can be recreated as their younger selves. RPG Maker MV - Add-on Vol.4- Kid Generator Parts
Every part includes the corresponding walk sprites, damage poses, and side-view (SV) battler sheets. Improving Narrative Depth If you aren't ready to buy this pack,
This DLC is included in the RPG Maker MV - Add-on Pack (formerly the Season Pass). If you already own that pack, you already have these parts. you already have these parts.