This was a British (I think) book about two pigs whose parents were having a party, so they gave them each like a dollar to go out and have fun while they set up. They went out and went to the candy store and all these other places, and then at the end of the day they didn’t save enough money to ride the bus home, so the candy store owner gives them a ride home. And something about lollipops! And I think it has the word “town” in the title. Like, the pigs go to town, or a day in town, or something something town. It was purchased in the early 1990s in a small bookstore in New Hampshire, where we also got another book called Animal Party, which is also British. Maybe the same publisher?