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Turn your iPhone, tablet, or smartphone into a working science lab, with no apps to download! The 24-page book includes 20 experiments that explore the science behind touch-screen technology. You'll use optical filters to explore the mysteries of light and much more. Plus, a clip-on, light-up microscope lets young scientists point, click and share extreme close-ups of microscopic images. Set includes four different polarizing and color filters, a filter adapter, specimen slide and carrying case. Uses 3 button cell batteries (included).