This answer and comments state that you can perform Young's two-slit interference experiment with white light and get a pattern of colored interference fringes. I've got some white LEDs lying around that I could use as a point source of light. Would one of these work as a light source for the experiment, or would the decidedly non-blackbody spectrum mess things up?
The point of the white light interference experiment is that all the light is interfering whatever the wavelength. The spectrum doesn't matter.
ps. Getting a white light pattern can be tricky, you could try with a single color LED first, or better still a laser pointer.
pps. A bare LED probably isn't enough of a point source for white light fringes - you might need a lens and a pinhole