Interstellar travel = fantasy.
No. For humans right now, yes. For small robotic craft, no.
I like the partial list of "challenges" they are going to have to overcome:
All will take considerable effort but aren't in principle things that can't be done. Personally, I think they may be able to launch these little "starchips" in 20 years or so.
everything that can be invented, has been invented.
Seriously though i’m sure it will happen in time, probably a LONG time... but it will, people will figure out things, if we dont destroy ourselves first...