She's about 3.5? Maybe a bit younger.
She's been funny with other adults, but she is notably funny with me - I know her from the co-op, actually, I've known her, a bit, since she was quite tiny, from running swaps.
Her weirdest recent trick - I was on shift, she needed a wee. I took her to the loo, she got on the toilet, I wandered off, came back, wandered off, came back, etc. Still no wee.
I asked, did she need the loo, was she going to pee? No. Then I asked if she would pee if someone else was in charge? She said yes. So another adult (who she knows less, afaik) took over, and she peed.
She does quite like DS1, who is good at being the Big Boy.
I do really have to follow her lead, and I can tell she's fine. I have told her I won't look at her until she wants me to (and not even in a huffy way!), and have been doing my best to stick to that. But I'm in the same room (on the mezzannine, however you spell it), so I can hear that she's fine, and interacting well with both DSes.