If you’re looking to show up in style & make a great first impression with your ancestors a DeLorean time machine is the way to go. A DeLorean is cool by itself but add Doc Brown mods, some math equations, hit 88mph & you get to experience temporal time displacement.
However, time travel is hazardous. You could meet yourself, thus causing a paradox & undoing the world's existence. But we think the danger of bumping into an unfriendly alien from the future might be even worse. As Doc Brown would say 'Great Scott!'
MAX MUMBLES says, "Go wreck a barn & wake the neighbors, just be sure to bring extra plutonium."