Trip to Hawaii
About Hawaii -
Hawaii is like no other place on earth. Home to one of the world's most active volcanoes and the world's tallest sea mountain. Former seat of a royal kingdom and home to the only royal palace on US soil. Hawaii is one of the youngest geological formations in the world and the youngest state of the union. But perhaps Hawaii's most unique feature is its aloha spirit: the warmth of Hawaii's people that wonderfully complements the Islands' perfect temperatures.
There are six major islands to visit in Hawaii: Kauai, Oahu, Molokai, Lanai, Maui, and Hawaii Island. You'll find each island has its own distinct personality and offers its own adventures, activities and sights. Mark Twain called Hawaii, "That peaceful land, that beautiful land... the climate, one long delicious summer day, and the good that die experience no change, for they but fall asleep in one heaven and wake up in another."
Source: https://www.gohawaii.com/statewide/discover/
Trip to Hawaii
About Six Islands -
Kauai
Kauai is the fourth largest of the Hawaiian islands, as well as the fourth most visited by tourists. Kauai's nickname is the "Garden Island" because of its tropical climate, waterfalls and lush vegetation. If you're planning a trip to Kauai, you'll want to visit Waimea Canyon, Hanalei Bay and Poipu Beach.

Oahu
Oahu is by far the most popular destination among tourists, attracting nearly twice as many visitors as Maui each year. It is the third largest Hawaiian island, It is also the most populated, and home to the capital, Honolulu. Must-sees during your stay include Waikiki and Pearl Harbor.

Molokai
Molokai is the fifth largest Hawaiian island, It is best known for agriculture and ranching, but is also notable for being home to the world's highest sea cliffs. Notable attractions to check out include the Molokai volcanoes in the east and west and the Hansen's Disease Settlement, a historic park.

Lanai
Lanai was once nicknamed the "Pineapple Island" because at one point, nearly the entire island was a pineapple plantation. Lanai is now the fifth most visited island, Most of the island remains undeveloped, though there are several resorts and golf courses.

Maui
Maui is the second largest island. Maui is most notable for its mountain ranges and valleys, and is often called the Valley Isle. It is the second most popular tourist destination in the state. While visiting Maui, make time to see the Kaanapali and Wailea resort areas and Haleakala, the largest dormant volcano crater in the world.

Hawaii
Hawaii -- also known as the Big Island -- is not only the largest of the Hawaiian islands, it is also the largest island in the United States. The Big Island is the third most visited by tourists each year. When visiting the Big Island, you'll want to see the Maunaloa volcanoes, Kau desert, Puna Fern Forest, Hawaii Volcanoes National Park and Kealakekua Bay.

Source: http://traveltips.usatoday.com/8-large-islands-hawaii-108082.html