Not Sure If This is Technology or Entertainment ...

I chose Entertainment because of the Lite Brite. I especially like the plaintive way in which the "M" drops off the face. Check out the Gallery. You'll see what I mean.

Gentlemen and Ladies, I give you The Solar Death Ray™

I've sent in a suggestion already.

Definitely entertainment.

Is this guy selling these? If so, he needs to build them bigger...like the size of a semi trailer.

He needs a way to adjust the focal point as well. If you make it bigger you want to be able to reach out farther.

Very nice!

It reminds me of my attempts to build a telescope. If you're going to make the mirror yourself you have to grind a piece of glass so that it has a parabolic surface and then have it silvered over. One person left a partially finished mirror out in the sun and got a little hole in the siding of their house when the sun hit it the wrong way!