What were some rhymes you remember that would help choose who was "it" in childhood games?

Ernie Meany my knee mow…......

Eenie meeny miney mo
catch a tiger by the toe
if he hollers let him go
eenie meenie miney mo

my mother told me to pick the very best one and you are IT!

One potato two potato…....

Red-white-yellow-blue
Every-body-out-but-you

See @zenvelo‘s answer.

Here’s one I recall
Lyrics by Mozart I believe :D

There’s a party on the hill
Will you come, come, come
Bring a cup & a saucer
And a bun, bun, bun
Who is your best friend?

BippityBoopity Bacon!
This answer, Imma fakin!

@lucillelucillelucille Ironically, that’s the best one yet.

A very simple one…

Dip doo maga zoo
Who’s on?
Not you

ENGINE-ENGINE NUMBER 9 RUNNING DOWN CHICAGO LINE, IF THE TRAIN SHOULD JUMP THE TRACK DO YOU WANT YOUR MONEY BACK (YES OR NO REPLY) Y-E-S- SPELLS YES AND YOU ARE NOT IT.