What does the idiom crocodile of children mean?

The idiom "crocodile of children" is not a commonly known idiom. It is not a standard English phrase and has no established meaning.

It's possible that you've misheard or misunderstood another idiom, or that it's a local saying in a specific region.

Could you please provide more context or information about where you heard this phrase? That might help me understand what it means.