Learning Resources Head-to-Toe Human Body Science Lab teaches children all about the science of the human body. The set lets kids examine fingerprints, use a stethoscope to hear a heartbeat, make a slimy model of blood, and more. The 36-page, illustrated storybook and activity guide includes 10 STEM-based activities. Kit includes a STEM storybook lab guide features 10 activities, a real working stethoscope, eye patch, eye chart, magnifier, and more