First graders in Nancy Carillo's class at Rolling Hills explained the difference between goods and services, and began to hone their entrepreneurial skills, during a "Shopping Day" in their classroom on Friday.

The students operated stores selling goods such as bracelets and bookmarks and services such as pencil sharpening and desk cleaning.

Principal Jessica Santarpia, superintendent Dr. Jordan Cox and other district administrators arrived in the class midday to serve as shoppers.

The mystery bag store was a particular hit, with much joy shared when a pair of shoppers received erasers as their surprise for shopping there.

Rolling Hills first graders learned about the tropical rain forest during a visit from the Long Island Center for Arts and Sciences on Thursday morning. The students saw photos and discussed rain-forest inhabitants including the red-eyed tree frog, clear-winged butterfly and the flying fox bat (AKA fruit bat).

Rolling Hills second grader Jaimin excitedly shouted to his teacher, "Miss Krompier, I feel like we have a whole new school."

And that summed up the excitement as Rolling Hills and Wood Park had back-to-back ribbon-cutting ceremonies to unveil new playgrounds.

 Superintendent Dr. Jordan Cox and other administrators were on hand to preside over the ribbon-cutting ceremonies.

 The equipment includes GaGa pits, teeter totters and a basketball hoop. Rolling Hills' playground even had an outdoor xylophone.

 Indian Hollow and North Ridge debuted similar playgrounds this past fall.