What they can do at 3 months

Let me take a shower
At arrival:
Scream, bang on door, cry, bang on door.
At 3 months:
"I'm going to take a shower now."
"Mom, can we play cards?"
I set up the cards for them. I go upstairs and take a shower. When I come down, they are still playing. I go outside to get the trash cans from the sidewalk. A. comes out to report that they've counted up their cards and how many points each one got. This actually happened.

Negotiate sharing with each other
At arrival:
"Yinei! (Mine!) Yinei! Yinei!" Grab. Hit. Waaaaahhhh!
At 3 months:
"I want toy pleeeeeease."
"Wait a minute... OK, here you go."
"Thank you."
"You wecko."
This actually happened more than once.

Let me go to the bathroom
At arrival:
Scream, bang on door, cry, bang on door.
At 3 months:
I'm in the bathroom. D. stands outside the door, sweetly reporting, "I'm waaiiiiting. I'm still waaiiiiting."

Let me make a phone call
At arrival:
Hang on mommy. Scream,"MAN NOW? (Who is it?) MAN NOW? MAN NOW?"
At 3 months:
Exaggerated quiet signs. Loud whispers of "Quiiiiiiiiet! Shhhhhhh!"

Independent play at the park
At arrival:
MUST. HAVE. YOUR. ATTENTION. AT. ALL. TIMES.
At 3 months:
"A, you rode your bicycle a little too far. Please stay where I can see you."
"Why you no see me? You have glasses."

What they cannot do at 3 months
Changes of plans:
We plan to take the dog for a walk in the morning, but it starts raining. We take the dog for a walk in the afternoon. The whine-o-meter goes to eleven.