While most kids are accustomed to celebrating Martin Luther King Jr. Day as a welcome day off from school, this year we encourage you to take an active approach to commemorating Dr. King's legacy by participating in the National Day of Service. While the president has officially designated Monday, Jan. 20 for the occasion, you can really take advantage of any (or all) days of the long weekend to get your family involved. Here are four ways that you and your kids can make a meaningful impact for those in need.