Part of the "JR. Scientist Series" designed for ages 8 - 10+. Fit the convex lens onto the telescope, and it's just like the one invented by German astronomer Johannes Kepler! Fit the convex and concave lenses onto the telescope, and it's just like the one invented by Italian scientist Galileo Galilei! Assembling the lenses will teach you about how light travels. Experiment with making a telescope and a microscope using convex and concave lenses. Set includes: Science guide (68 colour pages) Battery Requirments: No batterys required. Item Size : 285 x 225 x 55mm Age: 8+ Pieces: 1 Warning: CHOKING HAZARD-Small Parts. Not for children under 3 years Product is certified with ISO9001, ISO14001, ISO13485, and ICTI certificates. Manufactured with CE, GS, FCC, UL ETL and PSE electrical products requirements. Produced to comply with all RoHS, WEEE and REACH requirements. What's in the box Includes: - Telescope - Science Guide