Children build step by step for their own telescope, binocular, microscope, astronomical telescope, movie projector one of each time. Excellent to learn the principle and construction of these science tools building by themselves. Try various combination of lens and experience the effects of images and vision. Kids can learn the applications of telescope and microscope. It includes: Student workbook, Teacher guidebook (digital file available only), Gigo e-learning service. Requires 2 AA/LR06 batteries - not included