She does have a schedule at home, and her parents assure me that she is your average little girl. When they were here for the interview, and again when they came to sign on (they were here almost an hour both times), she was completely fine. She sat on the floor and mouthed toys the entire time.

Let me ask you this guys...

Is it "normal" for a 12 month old to:

- only vocalise by cooing (no consonants)
- be unable to crawl, scoot, shimmy, commando or anything else to move around
- be incapable of pulling up to standing
- unable to cruise on furniture
- unable to get down to a sitting position when placed against furniture

My gut says she is physically "behind". If this is the case, and she is cognitively fine, as she seems to be, perhaps she's just massively frustrated??

ETA: she seems reasonably calm when we are outside, so I am desperately trying to be out as much as I can, but the other kids want to do their crafts, have their snacks, do their indoor routine as well.