The prince helped agricultural science students at their request during a high school tour Tuesday. He also visited a primary school where he was serenaded by a steel band and a choir that sang traditional folk songs.
Harry previously visited Barbuda with his brother and mother as a young boy.
He is visiting the Caribbean representing his grandmother, Queen Elizabeth II, in the year of her 90th birthday. This year also is the 35th anniversary of independence for Antigua and Barbuda and the 50th anniversary for Barbados and for Guyana.
Harry travels next to the eastern Caribbean island of St. Kitts.