Spike turns back into a little kid

James Walkswithwind and Mad Poetess co-wrote two stories where our favorite Scoobies are kids again - the first story is Small Fry and the sequel is Son of Small Fry. Two of my favorites.

Two fics that have Spike as a child are

Stings by Kari Mouke

Innocence Found by Spike's Heart

Here's an old rec thread.

RennyM
I went hunting for Small Fry, and it's categorized as Spike/Xander here. Is it also Spuffy?

So Mote It Be by Ultrawoman. There's also a sequel where everyone but Dawn and Spike turn into kids too.