Glass
Kraul Spielzeug
Kraul is a German family business that encourages a love of nature, observation, and experimentation. Using the basic elements around us (earth, fire, wind, and water), Kraul's STEAM and engineering science kids allow kids to wonder at the world and inspire hours of nature based play.
When partially or completely filled with water, the glass ball becomes a magnifying lens. When held under water, it creates a reduction in size. In the world of optics, you quickly understand how a magnifying glass can also be a focal point or turn the world "upside down".