This project is so cute and easy and makes a great valentine for boys (and girls who love ninjas!) to give. I used a full-sized chocolate bar, which would be great to give to a teacher, but you could quickly make a bunch of these cuties from fun-sized bars to distribute to a whole classroom!
Cut a rectangle of red or black cardstock that wraps around a chocolate bar and overlaps itself by about 1/2". Don't glue yet - set the chocolate bar aside.
Cut out a long, skinny rectangle for the arms. It should be about 1" shorter than the width of the wrapper you just made. Also cut out two simple hands and a rectangle for the eyes out of white cardstock.
Glue the hands to the ends of the arm piece. Cut a rectangle for the face out of the wrapper, then glue the small white rectangle behind the hole. Make two dots for eyes with the black marker. Wrap the chocolate bar with the face/body wrapper and glue it shut. Glue the arms to the back so they stick out of the sides. Add a foam heart to the ninja's chest.
Pose the arms so that they are in a fighting stance with one arm extended and one arm bent over the body.