However, a large number of technologically complex devices do exist, and most of these devices exist in the Muggle world. From a certain perspective, it can be seen that Magic and electricity are the equivalents of each other in their respective worlds, but electronic equipment doesn't work around magic-filled areas, such as Hogwarts, and Muggle devices used by wizards (such as cameras and radios) can be made to function using magic instead of electricity. Such examples are rare, however; wizards rarely make use of Muggle technology, nor do they have much interest in doing so, even when such technology might make their lives much easier. Pure-blood Wizards are baffled by how Muggle technology works and most have no interest in understanding it (with occasional exceptions, such as Muggle aficionado Arthur Weasley, whose dearest ambition is "to find out how an aeroplane stays up"). "Muggle Studies" classes are offered at Hogwarts for those students with an interest. On several occasions, Harry Potter is tasked with having to explain the workings of commonplace Muggle technology, such as introducing the telephone to Mr Weasley in "Chamber of Secrets"; at the beginning of "Prisoner of Azkaban", Ron Weasley makes his first telephone call – with disastrous results for Harry.