For the unfamiliar: The Silver and Bronze Age occasionally published "Superbaby" stories, about Clark Kent's misadventures as a preschooler learning to properly use his powers. As for his superhero-ish clothes, it's a "playsuit" made of his invulnerable blankets.

The Zoo Crew story is about someone secretly pretending they've reformed, but working with sinister forces to do something horrific on Easter Sunday.

*Looks at today's news, sighs*

Also yes, Easter/Christianity exist on Earth-C, though with animal-pun names. (Wonder what the Spectre makes of this.)
@dtgeek Ha was there ever an Earth-C version of the Spectre? He'd be a goat, perhaps.
@timrichards guess since there's a "JLA" on Earth-C Minus, there's probably a Spectre-analog there (or an Earth-2 equivalent). But otherwise, they haven't shown or mentioned one AFAIK.