Kits #(17)Heart & Lungs; (18)The Digestive System; (19)Bones & Muscles; and (20)The Senses! 4 science kits provide hours of fun and learning. Heart & Lungs will expose your child to the basic parts of the respiratory system and circulatory system by building a lung and heart model, determining the lung volume of one breath, and by making a simple stethoscope. The Digestive kit teaches the importance of the digestive system by studying the different parts and functions of the digestive system and by testing for starch, protein, and fats in various food items. The Bones kit teaches about mechanisms, importance, and make-up of bones and muscles by making a hinge joint, a ball and socket joint, a leg model with bones and muscles, and learning the names of specific bones. The Senses kit teaches about the 5 senses-touch, smell, taste, sound, and sight!