A question, using the Rice Krispies jingle

If you heard someone sing the tag line from the Rice Krispies jingle thusly:

”Snat Crackle Tot, Rice Kristies”

what would they be doing?

 

A more detailed clue: Singing the Alphabet Song:

ADCDESG
HIJKLNNOT
QRS & TUZ
Duddlyu and XYZ

Now I know ny ADC
Tell nee what you think uz nee

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