Learning about electricity and circuits is going to be easier when you have handy tools like the Nectro pen to draw circuits. This pen is filled with conductive ink to let you draw functional circuits on photo paper or a specially coated transparent film. The developers have also worked on magnetic components and a circuit library to complete the system.
The Nectro pen has conductive and erasing tips. Whether you are a learner or a professional, this device has something to offer you. The project is getting funded on Kickstarter at this time.