25 Easy, hands-on activities that teach key concepts in physical, earth, and life sciences - and meet the science standards . Who knew that a simple coffee can could be turned into a barometer, an acoustic amplifier, or even a lung? These are just some of the super-fun, learning-rich hands-on activities guaranteed to get kids excited about science. All it takes is an empty coffee can! Students learn about friction, magnetism, electricity, erosion, weather, their senses, and more. A fun and easy way to meet the National Science Education Standards!