Kids will have hours of enjoyment (and learning!) with over 300 entertaining experiments. Each project introduces fascinating scientific principles, and shows children how and why things work. With a flowerpot and a stick as a sundial, follow the shifting shadows to read the time. Write a secret message in invisible ink made from vinegar and either lemon or onion juice. Other great experiments deal with everything from magnetism, air & heat, to reptiles and amphibians, invertebrates, and illusions!