Creating a flower pot is a bit like creating a dish for dinner. You can keep it quick and simple, you can get really creative for that special meal, or you can do something in between.

Fourth-graders Raffi Terteryan and Rodrick Karamkhodian huddled attentively around a flower tray and a blue-and-gold flower pot after lunch on Monday. “I can’t even see it,” said Raffi, the ...