It all starts at the eyepiece. The child puts an eye to it, slowly turns the focus and watches a blurred patch turn into the craters of the Moon or a bird on a branch several hundred metres away. What happens inside the tube? The objective lens gathers light from a distant object and forms an image, and the eyepiece magnifies that image. The idea is not new: in 1608 the Dutch spectacle maker Hans Lippershey put two lenses together and brought a distant church closer, a year later Galileo Galilei pointed such a telescope at the sky, and two hundred years after him John James Audubon drew the birds of America through one.
The telescope is sealed, and the galvanised, powder-coated frame withstands rain, frost and sun. It works in summer and winter without being put under cover, and the tube is mounted on a post permanently anchored in the ground. The image in the eyepiece is upright, not inverted, so a tree in the telescope stands the same way as it does in the landscape. A telescope is never pointed at the Sun without a filter; the glass solar filter screws only onto the objective lens of the astronomical telescope tube. The equipment works outdoors all year round and is covered by a warranty. The manufacturer is EduPlayground, and the telescopes are made in Poland.
Five elements: three decide what you see and how, and two provide a steady base and comfort at the eyepiece.