A DVD can split the sun light in several colours as a prism. But is it possible to see spectral lines? I observed sometimes thin dark lines like that in the upper part of the disk. But I'm not sure if it is some kind of interference.dvd1 dvd2
You can make a spectrometer out of a cereal box and a DVD or CD.
Some construction is necessary because you need to illuminate the DVD at an angle, with a narrow slit, and view the results.
Whether you can see some of the broader absorption lines from the Sun, I'm not sure. You can certainly see emission lines from bright lamps, but that is easier.