The finished product is only useful as &#x27;Art&#x27;. However, you can actually make useful things with a similar approach.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Solar_furnace" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Solar_furnace</a><p>IMO, this is just cool as an easy to understand 3d printer.