Big three-day weekend coming up for many of us. But still a few more hours to go before the celebration is official. In honor of Memorial Day and the men and women who died to make the world a better place, here a few online games to help do the same.

Free Rice: This is a trivia-type game. Guess the correct meaning of the words presented and the UN World Food Program will donate rice to those in need. One correct word donates 20 grains of rice, five words, 100 grains, and so on.

Delta's March of Dimes Online Tournament: Donate to March of Dimes and to get game plays for prizes. You can preview the puzzle games before donating. Prizes include 25,000 Delta Sky Miles, $100 American Express gift card and a $75 Amazon gift card. The tournament ends today, so act fast!

answer4earth: Another trivia-style game similar to Free Rice. Each correct answer makes a donation to plant trees and help save our environment.