Certain phrases picked up from school

Since he started school in January, he'd been really chatty. Picked things up really fast. Anyway, here's a few of his recent verbal expressions:

Are you ready, mummy?

Not again!

Thank you everybody.

Is it funny?........then he giggles

It's playdough time/ It's colouring time etc etc

Let's go/let's eat/let's pour etc etc

Oh my God

Besides, he's speaking in full sentences most of the time. Has correctly used prepositions and tenses too. Hmnn, I think his Mandarin would also improve by leaps and bounds when he starts his classes very soon (i hope)!