Explore how the heart and lungs work together for oxygen exchange
Uses a simple hand pump to demonstrate basic heart and pulmonary blood flow
Get ready to explore the wide world around you with science discovery toys and tools that help kids build observation and critical thinking skills used by real scientists, school supplies,teacher supplies!
A Brighter Back to School: Make this the smartest back-to-school yet with toys and tools from Learning Resource trusted by teachers and parents alike since 1984!
