March is signed by forming the ASL letter M sign with both hands, then moving them forward in unison in front of your body, in a staggered, regimented style. This would mimic all the legs of people marching together, whether for a band or parade.
Teach your toddler the march sign when watching a marching band or parade of marchers for the first time in your neighborhood, city, or on their school grounds.
Teach your toddler this sign in conjunction with other flash cards pertaining to music, festivities, and movements in unison. Kids are vector creatures, easily drawn to attractive sights and sounds. This would be a fun and easy flash card to teach when you are watching people marching live.