If an audition notice asks for
"2 candid photos (1 close up and 1 full body)" in addition to a regular headshot, what kind of pictures do they want? Thanks!

Candid means not posed. That doesn't mean snapshots. They still want to see a face and body type. Candid used to mean any 35mm photo as opposed to medium format, but now I would just go with non posed. Maybe find a friend that is camera savvy to help.

Take you child out in backyard with the sun shining on his/her back and take a bunch of pictures. Try not to get any with hands down to side, don't let them squint, have them wear something colorful, and just let them be a kid. Maybe something with a sibling, a dog, a toy.

Could I use just regular pictures that we already have? They would be posed but not professional and obviously in casual settings.

Yes. Sometimes cd's get tired of parents sending in perfect candids, they just want to see the kid in a non-professional setting. Plus, they feel really guilty when a parent runs out and pays a professional a bunch of money and they don't end up picking them. (Not that that would happen to you). If you have a decent headshot, just pick a couple of pictures, in focus and colorful, where your kid is smiling and relaxed. Good Luck!