Better is the "Chalk doodle time travel" technique. Essentially it is a long series of random doodlings that open "worm hole." A worm hole is a complex rift overlapping layer upon layer of the universe. You don't really "time travel" so to speak... you simply enter one portal in the universe and come out another... often years or centuries apart.
A couple parents got pissed at me 'cuz the doodles looked like hop scotch. Long story.