M'not cranky! = VERY cranky

Pweaseeeeeeeee? + puppy dog eyes = you're screwed, look away, they want something and they know they're cute.

I want [insert item]! =  Use your stern voice, they're getting very demanding.

Num Nums = They want food

Baba = They want a bottle

Most things are easy to understand, but if you have any confusion I might be able to help you out-