glass sphere

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The glass ball is hollow and when partly or wholly filled with water, becomes a magnifying glass. Reductions in image sizes are created if held under water. Recommended for 9+ yrs. Particularly suited to the study of light and optics in Grades 6 & 7. Instructions, explanations, and suggested experiments in English and French. Winner of the german Spiel Gut award. 6.5 x 6.5 x 4.5 cm. Weight 41 grams. Made in Germany. Show more