What is allowed through mail in juvie?

Question

and what is considered contraband

Answer 1

nothing illegal or that raises suspicion. for ex. knives, needles, drugs, or a threatening letter.

Answer 2

Letters, and possibly some pictures. Contraband is anything illegal, or anything that could conceal something illegal. Something as simple as baked goods would be contraband, because they don't know what is in them.

As far as a complete list of what is allowed, that is determined by the facility, so you need to call them to find out.