Answer: Oahu contains at least 10 different and distinct volcanoes. Diamond Head is well known by Honolulu visitors and some people even recognize the National Cemetery of the Pacific or the Punchbowl as a volcanic crater. A drive around the Island is required to spot some of the others. Koko Head and Koko Crater are easily defined from the air as is Salt Lake.
Answer: It entirely depends on when you are traveling (high/low season), if you got a good deal, how far you booked it in advance, if your ticket was round-trip or one-way, and what airline you chose. Most airlines offer deals during different travel times, especially if it is not peak season. If you wanted to go to Oahu in January, the flights would generally be between $300 and $500. Try checking travel sites that offer "low-fare" calendars.
Bing.com/travel cheaptickets.com alaskaairlines.com (yes, they fly to Hawaii) hotwire.com expedia.com travelocity.com priceline.com
Answer: Speedstacks.com is the leader in sport stacking and the offical cups of the wssa (world sport stacking association) these are the only cups that can be used in wssa competitions in which offical records are set. Current world records for sport stacking can be found at worldsportstackingassociation.org