This is George A Romero's ground breaking zombie flick from 1968.
Filmed on Black and White film, and on what can only be described as a shoe-string budget this film is singlehandedly responsible for bring zombies into the mainstream of modern culture and spawning countless zombie films just like it, some better and many immeasurably worse.
While much of it now would be considered outdated and the special effects used rather plain this is still quite a watchable film and something that you could use to introduce your kids to the world of horror without traumatizing them. Featuring none of the over the top gore that the following films in the franchise (Day of the Dead, Dawn of the Dead etc....) were renowned for, this can probably be considered one of the safer films for the horror newbie, where I guess hardened gore-fiends might find the pace of this one a bit slow
Over all its a great watch, and historically important to gain an understanding where the infection first took a hold on mainstream cinema audiences
We've got a youtube link for you as well so you can check out the movie for yourself!!!