An ice-cream that melted hearts

A few weeks ago, three of my friends and I had gone to the ice cream parlor. With the outside sitting, I was able to notice things that were happening around the store. There I saw this girl and her brother who were selling balloons to everyone who was standing nearby. But during those 15–20 minutes that we sat there, she was unable to sell any.
Read the whole story to find out how an ice-cream led to the melting of our hearts.