Expose youngsters to 3-D objects in a hands-on learning activity involving marshmallows and toothpicks. Engage your young mathematicians by introducing them to 3-D shapes by means of a story book. Explore 3-D shapes by manipulating marshmallows and toothpicks into cubes and pyramids. Using food as a learning tool is a great way to make learning fun for kids of all ages, especially youngsters. The math lesson includes safety tips as well as connections and extensions that can be done with upper grades.