Gracel can sign milk, sleep and brush teeth at 9 months 1 week old. And can sign diaper at 9 months 4 weeks old. She also understands when we tell her she has to go for a shower, it's time to read a book and if she wants to eat something. I know she understands cos she gets very agitated / excited for it and starts to behave herself. Sometimes, when I forget to tell her what's going to happen next, she does get cranky but when I tell it to her and she is expecting the next activity, she behaves better and doesn't throw tantrums.
She is growing so fast I wish time can slow down.
She is also enjoying her swim with papa nowadays :)