Marisa: *Slurred* "Mooom! Isn't this what you call human candy?!" *Jump jump* KoReimu: Yuu~? Mother Reimu: "Yuyu!! Yes. You did well, little ones!!" (Literally, the last sentence is, "you found it well!!" I wasn't sure if that was good wording.)
Panel 4: Mother Reimu: Hold it in your mouth and try opening it! Yes, yes, good!!" Marisa: Yuusho yuusho! (This, I think, is a take on the Japanese "yosho", or something like that, which is like the Japanese version of "heave-ho".) KoReimu: Yuu~!
I'm quite sure the sound effect for the candy wrapper is a tearing sound. So... yeah.