They were pretending to be a shop that has pills and medicine to help you feel better from a cold, chicken pox or food poisoning.
Nonny was the clerk while Molly was the customer. Molly came in Nonny's store. "I need some medicine for a cold that I have" said Molly. "Sure thing" said Nonny.
He pulled out a bottle that said "medicine for colds" and handed the bottle to Molly. "Thank you so much" said Molly. "No problem, but don't forget to give the medicine to your parents and ask them to give you the correct amount" said Nonny. "I will" said Molly, swimming away.
"Excuse me store clerk, but what time is it" asked Mr. Grouper. "ITS TIME FOR LUNCH" shouted Nonny. After lunch, Molly and Nonny decided to relax before going outside.