You can take your trip as a family, as a couple, or even solo. Some trips are done in the United States and others require abroad travel. In the United States, at Global Volunteers, you can work with local people for a week of service in education, labor, and cultural projects. If you enjoy the ocean, then maybe choose a marine conservation project in Seychelles that includes counting turtles and helping identify marine species. If you are adventurous, you can climb Mt. Kilimanjaro while also providing equipment and services to those with special needs including the wounded vets that have taken the journey with K2Adverntures.
Marine Conservation http://www.responsibletravel.com/holiday/2280/marine-conservation-project-in-seychelles
Veterans assistance and build hospitals
Reservations in the USA